Thrash metal is a type of heavy metal music known for its fast speed and aggressive style. Songs in this genre often use quick drum beats, deep guitar sounds, and fast, skillful guitar playing.

This music style began in the early 1980s when musicians combined the fast drumming and complex guitar techniques from the new wave of British heavy metal with the speed and energy of skate punk, hardcore punk, speed metal, and the technical skills of progressive rock. It also developed as a reaction against the conservative ideas of the Reagan era and the more pop-influenced glam metal, which was popular at the same time. A related style called crossover thrash mixes thrash metal with hardcore punk.

In the early days, thrash metal was supported by independent record companies like Megaforce, Metal Blade, Combat, Roadrunner, and Noise, as well as the underground music sharing through tapes in Europe and North America. From about 1985 to 1991, the genre became popular, helping bands like Metallica, Slayer, Megadeth, and Anthrax gain fame. These four bands are known as the "Big Four" of U.S. thrash metal. Other bands, such as Overkill, Metal Church, Nuclear Assault, Flotsam and Jetsam, and groups from the Bay Area like Exodus, Testament, and Death Angel, also had strong followings, often through shows on MTV’s Headbangers Ball. International bands from this time included Brazil’s Sepultura, Canada’s Voivod and Annihilator, Switzerland’s Coroner, England’s Onslaught, and Germany’s "Big Four" bands: Kreator, Destruction, Sodom, and Tankard.

Thrash metal became less popular by the mid-1990s because other music styles, like alternative rock and grunge, gained more attention. Some bands stopped making thrash metal or changed their style to include influences like punk, progressive music, groove metal, or alternative metal, and later industrial or nu metal. Since the late 1990s and early 2000s, the genre has grown in popularity again, helped by bands such as Bonded by Blood, Evile, Hatchet, Havok, Lamb of God, Municipal Waste, and Warbringer, who are credited with starting the "thrash metal revival."

Characteristics

Thrash metal typically includes fast music, low-pitched and complex guitar riffs, high-pitched guitar solos, and double bass drumming. The rhythm guitar parts use heavy distortion, power chords, and are often played with palm muting to make the sound tighter and more precise. Vocally, thrash metal can include singing, shouting, or screaming. Guitar solos are usually played very quickly and require advanced skills, such as shredding, and use techniques like sweep picking, legato phrasing, alternate picking, tremolo picking, string skipping, and two-hand tapping.

David Ellefson, the original bassist of Megadeth, said thrash metal combines the attitude of punk rock with the complex guitar riffs of traditional metal. Dan Lilker, a bassist and co-founder of Anthrax, S.O.D., and Nuclear Assault, explained that thrash metal started as "faster hardcore" music because people moved quickly when playing or listening to it. Over time, fans called it "thrash metal" because it sounded more like metal than hardcore.

Guitar riffs in thrash metal often use chromatic scales and focus on tritone and diminished intervals instead of simple scales. For example, the opening riff of Metallica’s "Master of Puppets" uses a chromatic scale that goes down and then up using a tritone.

Cymbal stops or chokes are used to switch between riffs or to speed up the music.

To keep up with other instruments, many bassists use a pick. However, some famous thrash metal bassists, like Frank Bello, Greg Christian, Steve Di Giorgio, Robert Trujillo, and Cliff Burton, use their fingers. Some bassists also use a distorted sound, a style popularized by Cliff Burton and Motörhead’s Lemmy.

Lyrics in thrash metal often discuss war, corruption, injustice, murder, suicide, loneliness, addiction, and other problems that affect people and society. Politics, especially negative feelings about government, are also common themes. Humor and irony sometimes appear, such as in Anthrax’s music, but they are rare.

Etymology

The word "thrash" first appeared in 1982 to describe a type of hardcore punk music on the album New York Thrash. By 1983, the term "thrash metal" became commonly used to describe music that combined elements of hardcore punk and metal. The magazine Metal Forces used the term in its first issue to describe bands on the Metal Massacre compilation and Mike Varney's first three U.S. Metal albums. Later that year, the Metal Mania magazine used the term in an article, stating it was used as a synonym for "heavy thrash" and "punk metal." The article listed bands in the genre, including Tank, Metallica, MDC, GBH, Discharge, and Crucifix. Sometimes, the term is mistakenly linked to a 1984 Kerrang! magazine article by journalist Malcolm Dome, who used "thrash" to describe the song "Metal Thrashing Mad" by Anthrax.

Around 1984, the most common name for what is now called thrash metal was "power metal." Over time, "power metal" came to describe a different music genre. During much of the 1980s, the terms "thrash metal" and "speed metal" were often used as synonyms. However, in the 1990s, the term "speed metal" was defined later to describe 1980s bands that connected thrash metal and power metal.

History

The term "proto-thrash" refers to bands that included elements of speed metal or thrash metal before these genres became popular in the early-to-mid-1980s. Deep Purple's 1970 album Deep Purple in Rock is considered one of the earliest examples of proto-thrash or speed metal. Music journalist Martin Popoff said, "This album shows strict structure and grand style, and the song 'Hard Lovin' Man' might be the first proto-thrash song ever." Queen's 1974 song "Stone Cold Crazy" and Black Sabbath's 1975 song "Symptom of the Universe" are also seen as early examples of proto-thrash. "Symptom of the Universe" inspired Diamond Head's song "Am I Evil?" which helped shape thrash metal.

The New Wave of British Heavy Metal (NWOBHM) bands that emerged in Britain during the late 1970s influenced the development of early thrash. Bands like Diamond Head, Iron Maiden, Venom, Motörhead, Tygers of Pan Tang, Raven, Saxon, and Angel Witch introduced fast, complex musical styles that became central to thrash. Phil Taylor's use of double-bass drums in Motörhead's 1979 song "Overkill" influenced many thrash drummers, including Lars Ulrich. Thrash bands also took inspiration from Judas Priest, as Slayer guitarist Kerry King said, "There would be no Slayer without Priest." Brian Slagel, an executive at Metal Blade Records, helped bring NWOBHM to a wider audience by discovering and recording early work from Metallica and Slayer.

Greg Prato of Ultimate Guitar noted that while thrash music looked more like punk than progressive rock (leather jackets instead of capes), it sometimes had musical elements similar to progressive rock. Canadian band Rush was an early influence on thrash. Anthrax drummer Charlie Benante said, "I learned to play drums by listening to Rush's live album All the World's a Stage."

Thrash metal also drew inspiration from punk rock, including 1970s bands like the New York Dolls, the Ramones, the Sex Pistols, and the Dead Boys, as well as 1980s hardcore punk bands like Discharge, GBH, Black Flag, the Misfits, the Dead Kennedys, and Bad Brains. The Ramones' 1976 self-titled debut album introduced the simple, fast guitar style that became a key part of thrash. The band Void, which released a 1982 split album with The Faith, is seen as an early example of combining hardcore punk with heavy metal. Their fast, energetic style helped shape thrash metal.

In Europe, the band Venom from Newcastle upon Tyne, formed in 1978, was one of the first bands in the thrash movement. Their 1982 album Black Metal influenced many extreme metal bands, such as Bathory, Hellhammer, Slayer, and Mayhem. British bands like Tank and Raven, along with German bands like Accept (whose 1982 song "Fast as a Shark" is often called one of the first thrash/speed metal songs), inspired musicians in central Europe. This led to the formation of bands like Sodom, Kreator, and Destruction in Germany, and Celtic Frost, Coroner, and Artillery in other European countries.

There is debate about which band was the first to play thrash metal. Some credit Venom, while others point to the "Big Four" bands: Metallica, Slayer, Anthrax, and Megadeth. Some also include Exodus, a band formed in 1979, as part of a "Big Five" group. Exodus released a demo in 1982 that helped start the Bay Area thrash scene. Other bands, like Overkill and Metal Church (formed in 1980), are also considered early thrash bands.

In 1981, the band Leather Charm wrote a song called "Hit the Lights." After Leather Charm disbanded, its lead songwriter James Hetfield met drummer Lars Ulrich through an advertisement. Together, they formed Metallica with guitarist Dave Mustaine (who later formed Megadeth) and bassist Ron McGovney. McGovney was later replaced by Cliff Burton, and Mustaine was replaced by Kirk Hammett. The band moved to the San Francisco Bay Area. Before settling on their final lineup, Brian Slagel asked Hetfield and Ulrich to record "Hit the Lights" for his Metal Massacre compilation in 1982. A re-recorded version of the song opened Metallica's first studio album, Kill 'Em All, released in 1983. This album is widely considered the first thrash metal album, and its song "Whiplash" is seen as one of the earliest examples of the genre.

Another "Big Four" band, Slayer, formed in 1981 when guitarists Jeff Hanneman and Kerry King met while auditioning for the same band. They recruited vocalist Tom Araya and drummer Dave Lombardo. Slayer was discovered by Brian Slagel, who included their song "Aggressive Perfector" in Metal Massacre III. In December 1983, five months after Kill 'Em All was released, Slayer released their debut album, Show No Mercy.

In Canada, bands like Annihilator, Anvil, Exciter, Razor, Sacrifice, and Voivod helped shape the thrash and speed metal scenes.

Thrash metal gained more popularity in 1984 with the release of Metallica's Ride the Lightning and Anthrax's Fistful of Metal, as well as Metal Church's self-titled debut.

Derivative forms

Thrash metal played a key role in creating underground metal genres, such as death metal, black metal, and groove metal. Metalcore, grindcore, and deathcore also use similar musical patterns in their songs, with metalcore placing more emphasis on melody than complex musical techniques. The mix of punk ideas and the intense, aggressive style of metal led to even more extreme and underground styles after thrash metal began to gain some popularity in the late 1980s.

Death metal developed in the mid-1980s, featuring more violent themes, lower guitar tuning, frequent use of fast, aggressive drumming, and harsh, deep vocal styles. Black metal, which also has connections to thrash metal, appeared around the same time, with many black metal bands influenced by thrash metal bands like Venom. Black metal became different from thrash metal by using more orchestral sounds, open, fast guitar picking, fast drumming, shrieking or raspy vocals, and themes based on pagan or occult ideas. Later, thrash metal blended with its related styles, creating new genres like blackened thrash metal and deathrash.

Thrash metal that includes stronger punk influences is called crossover thrash. Its sound is more similar to punk than traditional thrash metal but has more heavy metal elements than hardcore punk or thrashcore.

A mix of thrash metal and shoegaze, a music style known for dreamy, layered sounds, is called dream thrash. According to Emma Cownley of Metal Hammer, "Dream thrash combines the ethereal sounds of shoegaze with the distortion, blast beats, and fast guitar picking of thrash." One band that plays this style is Astronoid.

Groove metal takes the intensity and sound of thrash metal but plays it at a slower, mid-tempo pace, with most bands only occasionally playing at faster speeds. Since the early 1990s, groove metal has increasingly used sounds inspired by death metal.

Technical thrash, also called progressive thrash, is a more complex version of thrash metal that focuses on varied and intricate musical structures. This style combines elements from thrash metal, the New Wave of British Heavy Metal (NWOBHM), progressive rock, avant-garde, and jazz fusion. The band Watchtower is credited with starting technical thrash metal, and their first album, Energetic Disassembly (1985), is widely seen as the first to mix thrash with progressive metal. Other bands that play this style include Voivod, Coroner, Annihilator, Deathrow, Blind Illusion, Toxik, Artillery, Mekong Delta, Sadus, Heathen, Forced Entry, and Anacrusis. In the late 1980s and early 1990s, well-known thrash metal bands began adding more complex and progressive musical elements to their music, as seen in albums like Metallica's …And Justice for All (1988), Annihilator's Alice in Hell (1989), Overkill's The Years of Decay (1989), Megadeth's Rust in Peace (1990), Dark Angel's Time Does Not Heal (1991), Heathen's Victims of Deception (1991), and much of Testament's work from the late 1980s and 1990s. Some consider technical thrash metal to be an early form of technical death metal. In a 2026 interview with Metal Hammer, Coroner guitarist Tommy Vetterli claimed he helped "co-invent" the technical progressive thrash metal movement.

Regional scenes

Thrash metal developed mainly from several regional scenes, each with its own unique features and music styles.

• West Coast thrash metal (Bay Area): This scene, centered in California, became the most successful and is known for its complex and skillful music, strongly influenced by NWOBHM. Bands like Metallica, Exodus, Testament, and others from the Bay Area helped shape this style. Although some bands from Los Angeles, such as Megadeth and Slayer, were not originally from the Bay Area, they played many shows in Northern California early in their careers, helping to grow the scene.

• East Coast thrash metal: Based in New York and New Jersey, this scene mixed elements of hardcore punk with thrash metal. The music focused more on aggression and speed rather than technical skill. Bands like Anthrax, Overkill, and Nuclear Assault represented this style.

• Gulf Coast thrash metal: While less popular than the West and East Coasts, the Gulf Coast had at least three separate thrash scenes in Texas, Louisiana, and Florida during the late 1980s and early 1990s. These bands combined punk rock and early 1980s heavy metal influences. Notable bands include Atheist, Watchtower, and Pantera, with Pantera and Prong credited for helping create the groove metal style in the 1990s.

• British thrash metal: The British scene began with NWOBHM bands like Raven and Jaguar playing faster heavy metal. British thrash bands often focused on traditional heavy metal styles, which were heavier but less aggressive than American thrash. Crust punk was also an important part of this scene. Bands like Onslaught and Amebix were prominent.

• Brazilian thrash metal: Brazil had three main scenes in Belo Horizonte, São Paulo, and Rio de Janeiro. These bands played a key role in spreading thrash metal globally in the early 1990s. Sepultura and Sarcófago were among the most notable bands from this region.

• Teutonic thrash metal (Germany and Switzerland): Bands from Germany and Switzerland created a style that was more aggressive than American and Canadian thrash. Notable bands include Kreator, Destruction, and Celtic Frost.

• Canadian thrash metal: Canadian bands blended speed metal, progressive music, and hardcore punk, influenced by groups like Rush, Iron Maiden, and Metallica. Anvil and Exciter were early leaders of this scene, while Voivod, Sacrifice, and Annihilator were part of the "Big Four" of Canadian thrash. Other bands from the hardcore punk scene included Death Sentence and Beyond Possession.

• Australian thrash metal: Although not as central to the global thrash scene, Australian bands like Mortal Sin and Hobbs' Angel of Death gained attention in other countries during the 1980s. However, they struggled to attract large local audiences.