AbstractThe influence of extrusion process parameters on the mechanical properties of differently shaped AA 8090 and AA 8091 extrusions was investigated. Strength was shown to be influenced less by extrusion temperature and ratio than by the extrusion aspect ratio (width/thickness), which determines texture; the strength decreases considerably with increasing extrusion aspect ratio. On the basis of a quantitative texture analysis, the strength decrease can be calculated extremely accurately by the Sachs or the Taylor model depending on the homogeneity of slip distribution. Th.e influence of width/thickness ratio can be generalized and the strength in different areas of complex extrusions can be predicted.MST/1406