“…During the manufacturing process, small amounts of titanium carbide (TiC) or tantalum carbide (TaC) were added for grain boundary strengthening. TFGR-W has shown improved low-temperature ductility and resistance against neutron embrittlement compared to pure W materials [2,3]. However, for TFGR-W to be used as a PFM, its tritium retention behavior under fusion relevant plasma exposure conditions needs to be characterized.…”