A phenomenological theory is proposed for diffusion theory under bending, caused by the Gorskii effect. The theory predicts a three-stage creep curve for two-phase alloys and a one-stage curve for one-phase solid solutions. Formulas derived make it possible to determine the diffusion coefficient in the first two stages of the creep curve. Results from experimental studies of creep of a two-phase alloy of the V-Zr-H system under bending support the conclusions of the theory. Theory has substantiated and experiment has confirmed the existence of a shape memory effect caused by the redistribution of the β phase during diffusion creep.