Global strain generated by shuffling-dominated {101¯2}<101¯1¯> twinning

Recent experimental observations have revealed that {101¯2}<101¯1¯> twinning involves zero shear, confirming this twinning mode is dominated by shuffling rather than shear. This raises the question: how is global strain generated by shuffling in hexagonal close-packed metals without involving shear? This paper addresses this important question. We demonstrate that although shuffling does not contribute to the twinning shear, it generates a normal strain along the c-axis due to the misfit between the parent and the twin lattice.