Abstract We fabricated the low-fired Li 2 TiO 3 –MgO ceramics doped with LiF by a conventional solid-state route, and investigated systematically their sintering characteristics, microstructures and microwave dielectric properties. The results showed that temperature stability of Li 2 TiO 3 ceramics were improved by doping MgO. Well microwave dielectric properties for Li 2 TiO 3 –13 wt%MgO (LTM) ceramics with ɛ r = 16.4, Q × f = 87,500 GHz, and τ f = −1.2 ppm/°C were obtained at 1325 °C. Furthermore, addition of LiF enhanced the sinterability and optimized the microwave dielectric properties of LTM ceramics. A typically sample of LTM-4 wt%LiF ceramics with optimum dielectric properties ( ɛ r = 15.8, Q × f = 64,500 GHz, and τ f = −0.2 ppm/°C) were achieved at 850 °C for 4 h. Such sample was compatible with Ag electrodes, suitable for the low-temperature co-fired ceramics (LTCC) applications.