Abstract: An attempt has been made to investigate the influence of micro structure on mechanical properties such as tensile strength, elongation, hardness, and elongation of the 5xxx alloys under different annealed conditions. Pure Aluminium material does not possess sufficient strength hence the application are limited to a few. The alloying element Magnesium added to pure Aluminium enhances the mechanical properties through solid solution and leads to improve strain hardening ability. The large strength to weight ratio of 5xxx alloys find applications in aircraft industries. The experiments were carried out for a composition of Al 5xxx alloy having 92.47 % of Al and 6.46% of Mg in the form of rod produced by extrusion process. The correlation of mechanical properties with grain structure is established in the study.