||This symposium provides an opportunity of sharing recent advances in the science and technologies of light weight alloys and composites. This annual MS&T conference attracts materials scientists and engineers from all over the world, and provides a venue for faster technology dissemination. The symposium will address synthesis techniques, the fine scale microstructures, interfaces, phase transformations and mechanical behavior in light weight alloys and composites. The next generations of composites and light weight alloys would be used for aerospace, automotive and various structural applications. They will be expected to possess multiple advanced properties in addition to high strength and toughness. For example, in Aerospace applications, the light weight alloys and composites will be subjected to much greater extreme conditions of temperature, pressure and radiations. This symposium will include a wide variety of light weight alloys and composites, such as Al, Mg, Ti alloys, high entropy alloys and metal matrix, ceramic matrix and polymer matrix composites. Focus will also be on the improvements in the mechanical properties of these materials at relatively high temperatures and at extreme and corrosive environments.