The　effect　of　the　addition　of　CuO　and　TiO2　on　the　sintering　and　microstructure　of　alumina　ceramics　was　investigated.　The　sintering　kinetics　of　alumina　was　also　studied　in　the　presence　of　liquid　phase　formed　by　CuO　and　TiO2.　It　was　found　that　the　sintering　densification　of　alumina　ceramic　is　greatly　enhanced　by　the　addition　of　CuO　and　TiO2.　The　sintering　rate　of　alumina　increases　with　the　increase　of　the　additive　content.　The　density　of　alumina　ceramic　reaches　a　maximum　when　the　content　of　additives　CuO　+　TiO2　is　2%　(in　mass)　and　the　mass　ratio　of　CuO　and　TiO2　is　1/2.　The　grain　growth　of　alumina　is　promoted　by　the　additives,　and　the　shape　of　the　grains　is　equiaxed　crystal.　The　sintering　activation　energy　of　alumina　ceramics　is　25.2　kJ/mol　by　determining　according　to　isothermal　sintering　kinetics.　The　results　indicate　that　the　sintering　process　is　possibly　controlled　by　the　diffusion　of　Al3+　and　O2-　in　the　liquid　phase.