• Sintering temperature significantly affects densification, grain size, and W–W contiguity in 95W-HEA alloys.
• Optimal sintering at 1450 °C yields relative density of 96.61%, compressive strength of 2234.82 MPa, and hardness HV 400.6.
• Tungsten grains exhibit nearly spherical morphology in HEA binder, with formation of Cr–Mn oxide mixed phase.
• Activation energy for tungsten diffusion in HEA liquid phase is 354.514 kJ/mol, controlling grain growth.