Magnesium alloys have high potential as structural materials for aerospace and other transport applications due to their high specific properties, low density and high damping capacity. However, magnesium alloys have poor formability and limited ductility at room temperature ascribed to their hexagonal close-packed (HCP) crystal structure. Grain refinement is an important practice to improve the mechanical properties of magnesium alloy, while equal channel angular extrusion (ECAE) provides a tec...