Trinnium

Trinnium is a compound commonly used to armour spaceships, though slowly making its way onto battlesuits. Trinnium-Titanium Alloy is 3-quarters of the weight, and double the strength of Titanium-Steel Alloys normally used to armour battlesuits. It looks nearly identical to normal titanium and is nearly impossible to distinguish the 2. Introduction

Trinnium was first discovered on the planet Nimeria in 2210 and was first used to armour spaceships in 2160. Trinnium was only found on a select few worlds at the time, and was deemed highly expensive. The Emperor II was the first battlesuit to always feature Trinnium armour. The Road To Common-Use

It was eventually discovered that Trinnium existed on many planets, particularly those with suns very little like Sol. These deposits were found deeper underground than on Nimeria. Trinnium became standard spaceship armour as of 2255. During the 2300’s the Lightbringer, as the UNSC’s primary front-line battlesuit, made trinnium the popular battlesuit armour material it is today. The machine was fairly small and flimsy compared to other designs, but its Trinnium-Titanium alloy armour allowed it to compete toe-to-toe in terms of durability with other medium battlesuits. In 2380, Trinnium became the standard armour type of all command-use battlesuits, as more supplies of trinnium continued to be found.

Modern-Use

As Variable Frame battlesuits appeared as major players in the military scene, so too did Trinnium. About half of the NGB-Vanguard units produced were actually armoured with Trinnium-Titanium Alloy. During the Dismantlement War, the Legionnaire II, Icebreaker II, CBR-402-E TAU Enforcer, Baurus II, Spartacus, and the Vanguard II would all be produced with Trinnium armour.