Trinium (also called ke) is an element that is a hundred times lighter and stronger than steel when refined. It is also used as part of an alloy. (SG1: "Prometheus")
Unrefined trinium is brittle and relatively useless, although it can be strengthened for processing when forged. Stargate Command attempted to mine a mountain of trinium on PXY-887, but the local Salish tribe asked them to stop, feeling that their methods were wasteful and destructive. (SG1: "Spirits")
Fine-tipped trinium darts are capable of penetrating the soft part of Kull Warriorarmor. Theoretically, other similarly sharp weapons would be effective against Kull Warrior armor. (SG1: "Evolution, Part 1")
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