Titanium (Ti) can exhibit multiple oxidation states, but the most common and stable oxidation number for titanium is +4. This means that titanium tends to lose four electrons in chemical reactions, resulting in a formal oxidation number of +4.

For example, in titanium dioxide (TiO2), which is a common oxide of titanium, titanium has an oxidation state of +4. In this compound, each titanium atom is bonded to four oxygen atoms, each of which has an oxidation number of -2. The total oxidation number of titanium in TiO2 is therefore +4, balancing the -8 oxidation state of the two oxygen atoms.

Titanium can also exhibit other oxidation states, such as +2 and +3, but these are less common and typically occur in specific compounds or under certain reaction conditions.