In this study, Yittria Stabilized Zirconia/Titania powders synthesized via air plasma spray (APS) method such as morphology changes and phase transformations of core-shell structure characterized. Phase analysis of powders was performed by XRD. The crystallite size and lattice strain of YSZ/TiO2 core-shell structure was calculated by Williamson-Hall method. Morphology was observed with scanning electron microscope. EDS and map analysis were used for core-shell characterization. Results revealed that all TiO2 nano particles were melted around YSZ powders with the thickness between 1 up to 5 mu m. After spraying the YSZ/TiO2 mixture in water, strain values increased but crystallite size decreased. Moreover, the monoclinic phase transformed to tetragonal phase but cubic phase remained constant, approximately. (C) 2017 Elsevier B.V. All rights reserved.