In conventional power metallurgy, tungsten (W) sintering is commonly carried out at over 2000°C, which inevitably causes undesired grain growth and degraded strength. To address this issue, we introduced a feasible and scalable method to prepare dense and strong W alloys. The process route involved a wet-chemical technique (solution combustion synthesis), by which, uniformly blended W/La₂O₃composite powder with a particle diameter of approximately 36 nm was obtained. Subsequently, with the advantage of the high activity of the as-synthesized composite powder, we successfully prepared W–La₂O₃ alloy with a relative density of 95.0% using pressureless sintering at a temperature as low as 1500 °C. Owing to the low sintering temperature and the pinning effect of the in situ-generated oxide particles on the grain boundaries, the alloy could achieve a grain size of 0.57 μm. With the grain boundary and intragranular-oxide strengthening, the microhardnessand compressive strength reached 684.0 HV_0.2 and 2119 MPa, respectively, which are comparable to or even higher than those reported in the literature.