The objective of the present investigation was to study the effect of TiB<sub>2</sub> addition on sintering behavior and mechanical
properties of pressureless-sintered B<sub>4</sub>C ceramic. Different amounts of TiB<sub>2</sub>, mainly 5 to 30wt% were added to the base
material. Addition of 30wt% TiB<sub>2</sub> and sintering at 2050°C resulted in improving the density of the samples to about
98.5% of the theoretical density. The composite samples exhibited very good mechanical properties (hardness, flexural
strength and fracture toughness). As the amount of TiB<sub>2</sub> was increased from 15 to 30, the mechanical properties were
reduced, except for the fracture toughness, apparently due to excess amount of sintering aid in the specimen.