Titanium Ore

Titanium Ore is a Hardmode ore which can possibly replace Adamantite in a given world. Titanium, like all Hardmode ores is generated upon destruction of a Demon Altar with a Pwnhammer or higher. Like Adamantite, a Cobalt/Palladium Drill (or their Pickaxe-equivalents) or better is required to mine it.

Trivia

 * Titanium is a real metal. Its legendary reputation for durability is more based on its inert nature and corrosion resistance rather than its strength; in reality, titanium is no stronger than steel, though it is lighter and far more corrosion-resistant than it.