The effect of hot-pressing temperature on the densification behavior and mechanical properties of titanium diboride (TiB2) was investigated. TIB2 specimens were hot-pressed for 1 h at temperatures in the range of 1500 degrees-1800 degrees C, with an addition of 2.5 wt% of silicon nitride (Si3N4) as a sintering aid. The density increased markedly at temperatures in the range of 1500 degrees-1600 degrees C and remained constant thereafter. The formation of a eutectic liquid at 1550 degrees C was attributed to the steep increase in density. The hot-pressing temperature also improved the mechanical properties, such as the flexural strength, Vickers hardness, and fracture toughness of the specimens. Similar to the density, the mechanical properties improved remarkably at similar to 1550 degrees C, so that optimum properties were obtainable at temperatures as low as 1600 degrees C.