Tristhet is a Detroit band formed in 2014 that fuses atmospheric black metal with folk elements, incorporating melodic passages and earthy textures into an otherwise grim and wintry sound.

Tristitia Nigrum is a black metal band from Middletown, New Jersey, formed in 2018, pursuing a cold and austere approach to the genre with a name meaning 'black sorrow' in Latin.

Triton is a death metal band from Laredo, Texas, formed in 2023, bringing brutal heaviness from the Texas-Mexico borderlands.

Triton is a melodic death metal band from Roxbury, Massachusetts, formed in 2023, blending the hook-driven sensibility of melodic death metal with a direct, aggressive delivery.

Triton is a sludge/death metal band from Fort Collins, Colorado, formed in 2023, merging the slow, grinding weight of sludge metal with death metal's darkness and brutality.

Triumvir is a New York epic heavy/power metal band formed in 2020, constructing grand, anthem-driven metal rooted in the classic European power metal and traditional heavy metal traditions.

Triumvirate is a black metal band from Canon City, Colorado, formed in 2017, operating out of a small Front Range city and delivering a bleak, lo-fi take on the genre.

Triune is a Boulder, Colorado band formed in 2006 that melds melodic death metal and metalcore, balancing melodic riffing and clean-toned passages against heavier, breakdown-driven aggression.

Trivarius is a groove and death metal band from La Paz, Bolivia, formed in 2013. The band released their EP Dark Dreams in 2016, blending the rhythmic heaviness of groove metal with the aggression of death metal. They remain an active independent act in the Bolivian underground metal scene.