Titanium is an extremely strong magically reactive metal that originates from the eruptions of the mountain Titan. Titanium rains down following the eruptions and forms deposits in locations. It possesses several qualities that make it a valuable material for weapon and armourcrafting.
Firstly, Titanium is the strongest material in the known world, capable of slicing through poorly tempered steel blades. Titanium weapons rarely dull, and Titanium armour is extraordinarily resistant to damage.
Secondly, Titanium is magically reactive in it’s untempered state. Untempered Titanium reacts with ambient magic to grow into rectangular prism like structures, this is where most Titanium is mined. Tempered Titanium no longer grows. It is not known how or why this phenomenon occurs.