An important aspect of assessing the physical and chemical stability of SrTiO 3 phase under radiation is to evaluate the disorder caused by α-decays in the actinide loaded nuclear waste form during the repository time. Indeed, radiation can affect considerably the chemical durability of the solid waste forms, especially for α-emitter immobilisation. It is already known that amorphisation in SrTiO 3 can be described at room temperature, by the cascade-overlap model with an additional term representing the initial disorder creation. In the present work, it is shown by using Pb-ion beam to simulate the α-recoil nuclei for creating the disorder that Pb-dose rate and sample temperature during irradiation are two important factors that affect SrTiO 3 susceptibility to proceed toward amorphisation.