The physical, mechanical, and thermal properties of polycrystalline TiB2 are examined with an emphasis on the significant dependence of the properties on the density and grain size of the material specimens. Using trend analysis, property relations, and interpolation methods, a coherent set of trend values for the properties of polycrystalline TiB2 is determined for a mass fraction of TiB2 ⩾ 98 %, a density of (4.5±0.1) g/cm3, and a mean grain size of (9±1) µm. Titanium diboride (TiB2) is well-known as a ceramic material with relatively high strength and durability as characterized by the relatively high values of its melting point, hardness, strength-to-density ratio, and wear resistance . However, the current use of this material appears to be limited to specialized applications in such areas as impact-resistant armor, cutting tools, crucibles, and wear-resistant coatings. An important evolving application is using TiB2 cathodes in the electrochemical reduction of alumina to aluminum metal. Other applications may develop rapidly if the electrical discharge machining of TiB2 can be perfected. Economic factors may inhibit the broad application of this material, particularly the cost of densifying a material with a high melting point and concerns about the variability of the material's properties. The present paper addresses the latter issue by examining the physical, mechanical, and thermal properties of TiB2 as a function of density and grain size. This work extends the approach to data evaluation begun in previous studies on alumina and silicon carbide. The latter studies had a significant advantage over the present one, namely that the processing procedures were sufficiently well refined that batch-to-batch property variations could be relatively small. For titanium diboride, the processing procedures are not as highly refined, and consequently, one must anticipate greater batch-to-batch variability. Therefore, it is all the more important to have a coherent view of the properties of TiB2 and their dependence on microstructure. The present work constructs such a view in the context of trends in property values. If you are looking for high quality, high purity, and cost-effective Titanium diboride, or if you require the latest price of Titanium diboride, please feel free to email contact mis-asia.