The lattice structure of pure magnesium and most magnesium alloys is hexagonal-close-packed (hcp) structure, so twinning plays an important role in the plastic deformation of Magnesium alloys.

• 纯镁及大多数镁合金为hcp结构，孪生在镁合金室温塑性变形中起着重要作用。开展镁合金塑性变形机制研究，对镁合金在工业上的应用具有重要意义。