Calcium hexaaluminate (CaAl12O19, CA6) has great potential for application in high-temperature industries. However, owing to its intrinsic hexagonal lamellar crystal structure, it is difficult to obtain calcium hexaaluminate materials with high densification. In this study, using a two-stage sintering method and TiO2 sintering aid, the densification of calcium hexaaluminate materials (relative density >95 %) was achieved. The evolution behaviors of the phase composition and microstructure and the intrinsic sintering kinetics were investigated in detail. The results showed that the addition of TiO2 promoted the formation of CA6 grains with a more homogeneous morphology and an increased-density equiaxial morphology. The elevation of the sintering temperature the sintering temperature also facilitated the densification of CA6, as the growth rate of the CA6 grains along the C-axis raised significantly with the sintering temperature. When 1 wt% of TiO2 was added and the sintering temperature was 1750 °C, a CA6 material with a bulk density of 3.61 g/cm3 (relative density over 95 %) could be fabricated.