When titanium is mixed with oxygen, it undergoes a process called oxidation, forming various titanium oxides. The most common titanium oxide is titanium dioxide (TiO2), which is a white, insoluble compound. Other titanium oxides include titanium monoxide (TiO), titanium trioxide (Ti2O3), and titanium sesquioxide (Ti3O5).

The formation of titanium oxides depends on the temperature, oxygen concentration, and other factors. At room temperature, titanium reacts slowly with oxygen to form a thin oxide layer on its surface. This oxide layer protects the metal from further oxidation. However, at higher temperatures, titanium reacts more rapidly with oxygen, forming thicker oxide layers or even bulk titanium oxides.

Titanium oxides are important materials with various applications. Titanium dioxide, in particular, is widely used as a white pigment in paints, plastics, paper, and other products. It is also used as a sunscreen ingredient, a catalyst in chemical reactions, and a component in ceramics. Other titanium oxides have applications in the aerospace, automotive, and biomedical industries.

Overall, the reaction between titanium and oxygen leads to the formation of titanium oxides, which have significant practical applications due to their unique properties.