Titanium is a very reactive metal, its potential medical titanium alloy is very low equilibrium thermodynamic corrosion tendency in the medium is large. But in fact titanium is very stable in many media, such as titanium oxide, neutral and weakly reducing medium such as corrosion resistant. This is because the titanium and oxygen has a great affinity, in the air or an oxygen-containing medium, the titanium surface layer of dense, strong adhesion, large inert oxide film, a titanium substrate protection against corrosion. material titanium Even due to mechanical wear and tear will heal or regenerate quickly. This shows that titanium metal has a strong tendency to passivation. Oxide film medium temperature below 315 ℃ titanium remain this feature

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