Microhybridization as a surface modification method was used to prepare TiB 2 /Al 2 O 3 core/shell particles in this paper. The experiment included two parts. One part was that TiB 2 (micron)/Al 2 O 3 (nano) core/shell particles were fabricated directly by hybridization. Another part was that TiB 2 (micron)/Al 2 O 3 (sub-micron) composite particles were prepared using PE-wax as a transition layer, which has good binding capacity for both of them. PE-wax particles were first coated onto TiB 2 particles by hybridization, and then the sub-micron Al 2 O 3 particles were coated onto the surface of TiB 2 /PE-wax particles again. The coating process, effects of the transition layer and the structure of core/shell particles were investigated. The core/shell particle features were characterized by SEM, TEM, EDS, XPS and XRD. Results showed that after hybridization nano-Al 2 O 3 particles were coated directly on the surface of TiB 2 particles, but the sub-micron Al 2 O 3 could not. When adding PE-wax as a transition layer, PE-wax was filmed on the surface of TiB 2 particles and the sub-micron Al 2 O 3 particles were coated successfully on the surface of TiB 2 /PE-wax particles by hybridization. The PE-wax transition layer plays a role of binder in forming TiB 2 (PE-wax)/Al 2 O 3 core/shell particles.