Tritanium
Tritanium was an ore known to be 21.4 times as hard as diamond. It was found, among other places, on the planet Argus X. () The ability to melt tritanium was beyond Federation weapons technology in 2364. () 

During the autopsy of Hon-Tihl, the Klingon first officer of the , in 2369, Doctor Bashir found tritanium alloy fragments in his chest and upper arms, but determined that they were not the cause of his death. ()

Uses of tritanium 
Tritanium alloy was a widely-used construction material. The bulkheads of  were composed of tritanium. () It continued to be used in the 23rd century, when it was used in the . () In the 24th century, Federation starships, specifically , , and , also had tritanium bulkheads. (; )

The Erstwhile, a Class 9 cargo vessel, had a tritanium hull. ()

The hulls of Axanar cargo ships in the 2150s were composed of tritanium and disilicon polymers. ()

The hulls of Federation Type 6 shuttlecraft were composed of tritanium. A Class 2 shuttle's hull was also made from a tritanium alloy. (; ) 

Tritanium was also used as a type of armor plating in assault skimmers. ()

Federation EJ7 interlocks were composed of a tritanium compound. In 2369 Chief O'Brien's went missing and he found the remains in a power conduit alongside the organic remains of Ensign Aquino. Prior to this find, the computer located a tritanium source in the tool locker in level three. () 

The projectile fired from the TR-116 rifle was composed of tritanium. ()

Borg tactical drones possessed a tritanium infrastructure, as did Borg cubes. ()

The detonator of a warhead in a firing range  accidentally wandered into was protected by tritanium shielding. ()

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