Abstract: The TiMo_x solid solution alloys （x=0.03, 0.12, 0.25, 0.50, 1.00, atomic ratio）are synthesized using the electromagnetic levitation melting technique, and their absorption/desorption kinetics, hydrogen capacity are quantified. Results reveal that the reactions can be described by the first-order rate law. It is seen that the presence of Mo dramatically lowers the absorption/desorption activation energy, however, the increased concentration of Mo in the samples has an adverse effect on their absorption kinetics and lower their hydrogen storage capacity ,which means the energy level of Ti-Mo-H ternary system rises as the Mo content increases, namely, the increased Mo content lowers the dehydrogenation temperature of the hydride. The hydrogen storage properties also vary with reaction temperature. The hydrogen absorption activation energy, E_a, is 11.9, 8.0, -6.1, -1.4, 3.3 kJ/mol, respectively. E_a decreases with increasing Mo content and reaches minimum when Mo content is about 0.50, and then increases with more increasing Mo content. The activation energy for hydrogen desorption of TiMo_x hydrides (x=0.03, 0.12, 0.25, 0.50, 1.00, atomic ratio), E_d, is 37.9, 30.4, 32.6, 12.5 and 13.2 kJ/mol, respectively. E_d decreases as the Mo content increases, but the tendency is not obvious when the Mo content is below 0.50. For the dispersed and activated samples, where the rates are extremely rapid, consideration of possible slow steps for hydrogen sorption must be given to mass transport control.