Abstract A thermo-mechanical processing technique for reducing the transverse effect of high strength Al alloys is described. The technique, called Intermediate Thermo-Mechanical Treatment (ITMT) was applied to a high purity AlZnMgCu, 7075 type alloy. ITMT is based on the combination of warm deformation and heat treatments, and involves the recrystallization of the ingot in small equiaxed grains, in an intermediate stage of the working. As a result of the present processing, the alloy exhibits better ductility, toughness and stress corrosion properties, for a given strength, than have conventionally processed materials, mainly in the transverse directions. Moreover, it has been found that the combination of ITMT and FTMT (Final Thermo-Mechanical Treatment) results in wrought products characterized by exceptionally high properties.