Solid solutions of titanium diboride-tungsten diboride (TiB2WB2) were synthesized by induction-field-activated combustion synthesis (IFACS) using elemental reactants. In sharp contrast to conventional methods, solid solutions could be formed by the IFACS method within a very short time, similar to2 min. Solutions with compositions ranging from 40-60 mol% WB2 were synthesized with a stoichiometric ratio (Ti + W)/B = 1/2; however, samples with excess boron were also made to counter the loss of boron by evaporation. The dependence of the lattice constants of the resulting solid solutions on composition was determined. The "a" parameter decreased only slightly with an increase in the WB2 content, whereas the "c" parameter exhibited a significant decrease over the range 40-60 mol% WB2. Solid-solution powders formed by the IFACS method were subsequently sintered in a spark plasma sintering (SPS) apparatus. After 10 min at 1800degreesC, the samples densified to relative density 86%. XRD analysis showed the presence of only the solid-solution phase.