Anvils allow you to rename items, repair enchanted items, and even combine the enchantments from different items, at the cost of experience points. Crafting. You'll need 3 blocks of iron, plus 4 more iron bars, for a total of 31 iron bars.
Passivation is the treatment of the surface of stainless steels, often with acid solutions (or pastes), to remove contaminants and promote the formation of the passive film on a freshly created surface (e.g. through grinding, machining or mechanical damage).
Finishing Titanium. While titanium possesses all of these properties, as with other alloys, additional finishing is required to ensure that parts are clean and free of exogenous materials. Passivation is a chemical process that helps restore the contaminated material to original corrosion specifications.