This study introduces a novel class of high-entropy alloys (HEAs), (FeCrVMn)100-xTix (x = 0, 2, and 5), exhibiting low activation and excellent mechanical properties for nuclear fusion applications. These HEAs are synthesized using vacuum arc melting, and their phase composition and stability are investigated using the \({\Delta H}_{\text{mix}}\) - \(\delta\) , Ω – δ, and VEC criteria. The mechanical properties of (FeCrVMn)100-xTix HEAs are characterized through flat indentation tests, based on energy–density equivalence principle. The primary phase of these alloys is a body-centered cubic solid solution. Obvious dendritic segregation is observed in the FeCrVMn HEA, and the addition of Ti eliminates this segregation. In the (FeCrVMn)98Ti2 and (FeCrVMn)95Ti5 HEAs, several intermetallic compounds are detected, including Ti4V, TiFe, VCr, CrFe, and Cr2Ti. Ti-containing HEAs exhibit better yield strength compared to Ti-free HEA, which is attributed to the reduced grain size, the formation of intermetallic compounds, and enhanced solid solution strengthening.
