Boride ceramics are useful materials because of their high strengths, hardness and melting points, which allow them to be used as high-temperature structural materials. In this study, sintered bodies of a solid solution of ZrB2-TiB2 system were prepared using hot pressing (HP) and spark plasma sintering (SPS). The sintering behavior was evaluated, and the effect of pulverization on sinterability and reactivity was examined using a Nanomizer. The combination of SPS processing at 2200 degrees C and pulverization yielded a nearly single-phase Zr0.5Ti0.5B2 solid solution having a relative density of 95%. (C) 2006 Elsevier Ltd. All rights reserved.