Titanium-A armor

Titanium-A Armor is the most common hull plating used by the UNSC. It is high-grade titanium and is usually brownish in color. Titanium-A has numerous uses throughout the UNSC. This is due largely to Titanium's properties; it is a light and extremely strong metal with a high tolerance for heat.It took newfoudn importance after the beginning of the Human-Covenant War. To contend with the Covenant's plasma weaponry, humans needed armor that would withstand the heat.

Its primary use is as starship plating. UNSC Frigates have sixty centimeters of plating on their hull, and UNSC Destroyers have two meters of it. Marines sometimes have Titanium-A armor suits, though these are increasingly becming a rare sight.

Titanium-A is also used in the construction of UNSC probes because the rough transition into slipspace demands a strong and durable alloy that will not break under the pressure.

The UNSC uses Titanium-A for construction of bases as well, to make them less suceptible to destruction. Places such as HIGHCOM Facility Bravo-6, CASTLE Base, and Camp Hathcock use Titanium-A armor in their superstructures.