What is the corrosion resistance of titanium? How does it perform in common media?

The inertness of the titanium tube depends on the existence of the oxide film. Its corrosion resistance in the oxidizing medium is much better than that in the reducing medium, and rapid corrosion can occur in the reducing medium. Titanium has excellent corrosion resistance in some corrosive media, such as seawater, wet chlorine, chlorite, and hypochlorite solutions, nitric acid, chromic acid, metal chlorides, sulfides, and organic acids. However, in the medium in which titanium reacts to produce hydrogen (such as hydrochloric acid and sulfuric acid), titanium usually corrodes relatively quickly. However, adding a small amount of oxidant to the acid will cause titanium to form a passivation film to delay its corrosion, so in the mixed night of strong sulfuric acid-nitric acid or hydrochloric acid-nitric acid, even in hydrochloric acid containing free chlorine, titanium is corrosion-resistant. Titanium's protective oxide film is often formed when metal encounters water. Even small amounts of water or water vapor can form. If titanium is exposed to a strongly oxidizing environment completely free of water, rapid oxidation can occur and violent combustion can occur. This behavior occurs when titanium reacts with fuming nitric acid containing excessive nitrogen oxides, and titanium reacts with dry chlorine.
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