Modification of atomic mobility in a Ti-based bulk metallic glass by plastic deformation or thermal annealing

► Atomic mobility in Ti40Zr25Ni8Cu9Be18 bulk metallic glass have been investigated by dynamic mechanical analysis. ► The atomic mobility can be evaluated through the value of the loss factor. ► Structural relaxation and crystallization induce a decrease of the loss factor. ► Cold-rolling increases the concentration of defects and therefore enhances the atomic mobility. ► The higher is the cold-rolling ratio, the higher is the loss factor.