Discovering new materials and improving our control of the structure and properties of known materials are keys to the continued growth of our economy and our ability to improve life and health for future generations. Just about we use are made from combinations of metals, ceramics, polymers, and natural materials. As consumer demands and competitive requirements drive more complex, higher-efficiency, and enhanced-performance materials solutions, we continue to push the frontiers of the physical limitations of many of the materials in use today. IMat researchers are focused on six grand challenges: Energy, Biomaterials, Computing and Electronics, Mobility and Infrastructure, Security, and Sustainability.