Casings and Sheilding Steel: Steel is the most basic of ship armor, and is never used on combat craft. It is, however, used on smaller civial vessels, and science statitions, as these are craft that aren't supposed to be attacked, and it makes production costs significantly cheaper. Titanium: Titanium is, of course, stronger than steel, and is more commonly used in fighter craft, drones, and more important civilian craft. It has a higher heat tolerance and tensile strength than steel, and takes about fifty percent more damage to puncture than steel. Titanium Carbide: Titanium Carbide is a special form of titanium, which uses diamond reinforcement, and special manufacturing techniques to make. It's twice the strength of titanium, and is more common on fighters and smaller capitol-ships. It's too expensive to be mounted on any but the most unique civilian craft. Tungsten: Tungsten armor is the strongest armor available, made of the metal of the same name. Tungsten has an incredible heat tolerance, and a high tensile strength, so it's perfect for military use. However, being difficult to forge, it's not frequently used, as it's very expensive to mount on a ship. Larger capitol ships and flagships are common users of this powerful armor. Shielding: Shields work by using numrous power generators on the ship's surface, which emit a high-frequency energy barrier that encases the ship, protecting it from energy attacks. Unfortunately, missiles can pass right through shielding. The ship protected by shield can fire through them, as they set the frequency of their weaponry to match that of the shield, thus passing right through it. Hence, if you could determine the frequency of a target's shielding, you could shoot right through them. Shielding is not frequently used, and when it is, mostly on capitol ships. Phase Shield: Phase Shields use a special enhancement device that controls their frequency. This device works by altering teh frequency when it sees that the shields are about to fail, this "resetting" the shields to full endurance. It can use up to two thousand frequencies before finally failing, giving any shield a remarkable endurance against heavy firepower, even the Particle Accelerator. Hard Shield: Hard Shields are, like Phase Shields, specially enhanced shields. This time, however, it uses a device like a generator to increase the power the shields can draw on, enabling the emitters to emit higher amounts of power. This not only makes the shields visible to the naked eye, but makes the energy they use so dense that even solid projectiles are stopped dead. However, they cannot be readily combined with Phase Shields, as when the frequency changes, it takes about five minutes to recharge enough power to create the Hard Shields.