Abstract: P-t curves of titanium tritiation a investigated at the 823~1 023 K by using the method of the reaction rate analysis in a constant volume system.The rate constants of titanium-tritium reaction are determined and the activation energy obtained by this analysis is(155.5±3.2) kJ/mol.The activation energy of titanium-tritium is obviously higher than that of titanium hydrogenation and deuteration from comparing with the reported data.