Tritanium

Tritanium is an impressively durable metal.

Fiction

3H comics

Megatron's claws are made from tritanium. Herald

Dreamwave Unicron Trilogy comics

Dreamwave Armada comic

The Mini-Con Moonbase was, among others, enforced with reinforced tritanium. Armada #9

Energon comic

Ironhide created a "tritanium-lined resonant space" for a very complicated shock-absorber that would render his seismic-shock warhead useless. Aftershock