Thermochemical analyses of gaseous equilibrium data involving the species TiCl, TiCl2, and TiCl3 were revised with the aid of more recent information on the low-lying electronic states, yielding more reliable values for the enthalpies of formation, Delta H-f(298)degrees, of 40.9, -49.0, and -121.5 kcal mol-', all +/- 2 kcal mol(-1), for gaseous TiCl, TiCl2, and TiCl3, respectively. The new thermochemical data are in good agreement with the results of recent theoretical calculations, but they differ from earlier experimental results involving the reactions of Ti (s), TiCl2(s, g), TiCl3(s, g) and TiCl4(g).