Titanium sulfide

The titanium sulfides are a class of chemical compounds comprising titanium and sulfur in varying stoichiometries. They include:
 * Titanium(II) sulfide, a rare mineral
 * Titanium(III) sulfide, a refractory
 * Titanium(IV) sulfide, used in batteries or other electrochemical cells
 * Titanium "trisulfide", technically a mixed-valence sulfide and disulfide salt