The inner structure of Dowmetal fabricated by various processes, such as forging, rolling, extruding and drawing, has been studied by means of x‐ray diffraction. The x‐ray diffraction patterns are identified by comparing them with computed fiber patterns for the close‐packed hexagonal system,c/a=1.62. Three distinct structures are obtained—a [210] fiber structure at ordinary temperatures and a [110] fiber structure at temperatures higher than about 450°C with the fiber axis, in both cases, in the direction of extrusion or drawing, and a [001] fiber structure with the fiber axis in the direction of forging. The difference in the structure of metal extruded at low and high temperatures is discussed in terms of the glide systems of magnesium.