Trivial Difference is a thrash metal band from Alexandria, Virginia, formed in 2021, drawing on classic Bay Area and East Coast thrash influences with modern precision and urgency.

Trivium is one of the most prominent American metal acts of the 2000s, formed in Orlando, Florida, known for bridging metalcore, thrash, and heavy metal across a commercially successful and critically recognized discography that includes albums such as Ascendancy, Shogun, and The Sin and the Sentence.

Trocar is an Arizona grindcore and cybergrind project formed in 2022, combining the speed and brutality of grindcore with electronic and digital production elements for a mechanized assault.

Trocaria is a symphonic metal band from Charlotte, North Carolina, formed in 2013, pairing orchestral arrangements and operatic vocals with heavy guitar work in the tradition of European symphonic metal.

Troglodyte is a Kansas City, Missouri death metal band formed in 2011, notable for a concept centered on Bigfoot and cryptid mythology rendered in thick, lumbering death metal with darkly comedic undertones.

Troglodyte is a Philadelphia death metal band formed in 2011, delivering heavy, no-frills death metal rooted in the mid-Atlantic underground scene.

Troglodyte Dawn is a Phoenix, Arizona band formed in 2014 that blends doom metal with ambient and rock elements, creating slow, meditative compositions that drift between crushing heaviness and atmospheric drift.

Trojan Swamp Monster is a melodic death metal band from St. Helens, Oregon, formed in 2019, crafting hook-laden death metal that matches melodic guitar leads to swampy, aggressive riffing.

Trokar is a brutal death metal band from Anniston, Alabama, formed in 2024, continuing a long-running tradition of uncompromising extremity with a sound rooted in guttural vocals and technical, punishing instrumentation.