Using molecular dynamics simulations, we systematically investigate shock-induced migration of a set of tilt grain boundaries in Cu, including coherent twin boundary, 15 asymmetric tilt grain boundaries (ATGBs), and symmetric incoherent twin boundary (SITB), with inclination angle () increasing from 0° to 90°. Grain boundary migration occurs only in ATGBs, via faceting for and translation for (with the 9R phase). Migration magnitude increases with increasing for ATGBs. Migration mode and magnitude depend on the grain boundary structure including SITB orientation and length fraction, and the symmetry of resolved shear stress distribution across a grain boundary.
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