The incorporation mechanism of TiO2 particles into zinc electrodeposit is reported. Two types of TiO2 particles exist, namely, 50 nm in diameter coarse particles and 10 nm in diameter fine particles. The coarse particles precipitate on the (00 . 1) 7 as lined up particles along the laterally growing macro steps and as randomly dispersed particles. The sidewalls of macro steps incorporate coarse particles at the edge of the (00 . 1). The atomic steps may incorporate the bottom of the randomly dispersed coarse particles. The fine particles precipitate on the (00 . 1)., as randomly dispersed particles and they might be incorporated into the atom. Also, with orientation image mapping, size of (00 . 1), orientation and size of hexagonal platelet crystals coinside.