Trinakrius is a power/doom metal band from Palermo, formed in 2024. Like Trinakria, their name references the ancient name for Sicily, delivering power and doom metal infused with Sicilian identity.

Trippelgänger is a stoner/doom metal band from Aalborg, Denmark, formed in 2021. They deliver heavy, trippy stoner doom from northern Denmark.

Triptykon was formed in Zürich, Switzerland in 2008 by Thomas Gabriel Fischer following the dissolution of Celtic Frost, his second celebrated band after Hellhammer. The project continues Fischer's exploration of extreme, gothic, and doom-inflected metal across two studio albums, Eparistera Daimones (2010) and Melana Chasmata (2014), both on Century Media. Dense, funereal, and deliberately paced, Triptykon represents Fischer's most introspective and stylistically unified work to date.

Tristsanguis is a depressive black/doom metal project from Cornwall, formed in 2024. Their Latin-derived name, suggesting 'sad blood,' reflects the deeply sorrowful and oppressive nature of their blackened doom from England's remote southwest.

Trogne emerge from Fribourg, Switzerland under the Latin motto "Ad Majorem Ebrietatis Gloriam" — to the greater glory of intoxication — releasing albums "Ethyloéréthisme" and "Ethyloccultisme" that merge black metal darkness with doom metal weight. Their alcohol-soaked thematic concept and crushing riffs place them firmly in the lineage of irreverent, hedonistic extreme metal.

Trollcave is a funeral doom/death metal band from Barcelona, Spain, formed in 2022. They deliver glacially paced, cavernous doom from the Catalan underground.

Troy the Band is a doom and stoner metal outfit from London, England, formed in 2022. They deliver lumbering, fuzz-drenched riffs and heavy grooves rooted in the low-end traditions of British doom.

Tumanduumband is a doom and sludge metal duo from Stourbridge, England, formed in 2019. They deliver massive, slow-moving heaviness that draws on the crushing traditions of both doom and sludge.

Tuomiokirkko deliver black and doom metal from Finland under the Finnish word for 'cathedral,' channeling sacred architecture's imposing grandeur since 2023. Their compositions build towering sonic structures as awe-inspiring and oppressive as their ecclesiastical namesake.