Why Titanium Resists Corrosion: The Mechanism, Seawater Data, and When It Actually Fails
Titanium’s corrosion resistance comes from a 2–10 nm TiO2 oxide film that forms within milliseconds of exposure to air or water and self-heals when damaged. In natural seawater at 25°C, commercially pure titanium (Grade 2) corrodes at less than 0.0005 mm/year — effectively zero. But titanium is not inert in
