The effect of the addition of V2O5 on the structure, sintering and dielectric properties of M-phase (Li(1+x-y)Nb(1-x-3y)Ti(x+)4(y))O-3 ceramics has been investigated. Homogeneous substitution of V5+ for Nb5+ was obtained in LiNb0.6(1-x)V0.6xTi0.5O3 for x less than or equal to 0.02. The addition of V2O5 led to a large reduction in the sintering temperature and samples with x = 0.02 could be fully densified at 900degreesC. The substitution of vanadia had a relatively minor adverse effect on the microwave dielectric properties of the M-phase system and the x = 0.02 ceramics had epsilon(r) = 66, Qxf = 3800 at 5.6 GHz, and tau(f) = 11 ppm/degreesC. Preliminary investigations suggest that silver metallization does not diffuse into the V2O5-doped M-phase ceramics at 900degreesC, making these materials potential candidates for low-temperature cofired ceramic (LTCC) applications.