The effect of the addition of V 2 O 5 on the structure, sintering and dielectric properties of M-phase (Li 1xy Nb 1x3y -Ti x 4 y)O 3 ceramics has been investigated. Homogeneous sub-stitution of V 5 for Nb 5 was obtained in LiNb 0.6(1x) -V 0.6x Ti 0.5 O 3 for x < 0.02. The addition of V 2 O 5 led to a large reduction in the sintering temperature and samples with x 0.02 could be fully densified at 900°C. The substitution of vanadia had a relatively minor adverse effect on the micro-wave dielectric properties of the M-phase system and the x 0.02 ceramics had r 66, Qf 3800 at 5.6 GHz, and f 11 ppm/°C. Preliminary investigations suggest that silver metallization does not diffuse into the V 2 O 5 -doped M-phase ceramics at 900°C, making these materials potential candi-dates for low-temperature cofired ceramic (LTCC) applica-tions.