Tritanium
- Metallic element
- Rare ore found in planetary bodies (TOS: "Obsession"; TNG Novel: The Buried Age)
- Known in Sol-local space as early as 22nd century (ENT: "Fight or Flight")
- Extremely dense element, 21.4 times harder than diamond (TOS: "Obsession")
- Often used in starship hulls (ENT: "Fight or Flight", "Dead Stop"; TNG: "Where Silence Has Lease", "Rascals"; VOY: "Threshold", "Year of Hell, Part I")
- Crystal-tritanium structure used by 2270s for greater strength (TOS Novel: Ex Machina)
- Strikes careful balance between durability and weight; hardest element commonly used on a wide scale in starship construction as a result
- Commonly used for antimatter pod construction due to durability (TNG Novel: A Time to Be Born)
- Often used in starship hulls (ENT: "Fight or Flight", "Dead Stop"; TNG: "Where Silence Has Lease", "Rascals"; VOY: "Threshold", "Year of Hell, Part I")
- Starfleet weapons insufficient to melt tritanium by 24th century, specialized equipment required to work the metal (DIS Novel: Desperate Hours; TNG: "The Arsenal of Freedom")