In the present work,6082 Al alloy has been rolled to 40% and 70% thickness reductions at the cryogenic and room temperatures for the improvement in mechanical and fracture toughness properties.All cryorolled samples are subjected to aging at different temperatures,i.e.,140,160,and 190 °C to improve the strength,ductility,and fracture toughness.The microstructures of the cryorolled(CR) and room temperature rolled(RTR) alloy after 40% and 70%thickness reductions are characterized by FE-SEM to reveal the modes of failure.The results show that the starting bulk Al alloy specimen is fractured in total ductile manner,consisting of well-developed dimples over the entire surface.The mechanical properties and fracture toughness of the 70% CR alloy are found better than 70% RTR alloy due to higher dislocations density and formation of sub-grain structures in the CR alloy. In the present work, 6082 Al alloy has been rolled to 40% and 70% thickness reductions at the cryogenic and room temperatures for the improvement in mechanical and fracture toughness properties. All cryogenic samples were subjected to aging at different temperatures, ie, 140, 160, and 190 ° C to improve the strength, ductility, and fracture toughness. The microstructures of the cryorolled (CR) and room temperature rolled (RTR) alloy after 40% and 70% thickness reductions are characterized by FE-SEM to reveal the modes of failure. results that results show that the starting bulk Al alloy specimen is fractured in total ductile manner, consisting of well-developed dimples over the entire surface. mechanical properties and fracture toughness of the 70% CR alloys are found better than 70% RTR alloy due to higher dislocations density and formation of sub-grain structures in the CR alloy.