The promise of fusion – a potentially game-changing source of low-cost, abundant energy – is constrained by a number of challenges, central among them the lack of materials that can withstand the extreme environments created in fusion reactions. Now $3.1 million in funding from the Department of Energy’s (DOE’s) Advanced Research Projects Agency-Energy (ARPA-E) OPEN 2021 program will fuel a Los Alamos National Laboratory project to develop novel, tungsten-based alloys that can be used in fusion reactors. The material’s unique design and fabrication potential means that the future of fusion power might be closer than ever before.