Influence of titania sol in the electrolyte on characteristics of the microarc oxidation coating formed on 2A70 aluminum alloy

► The effect of titania sol in the electrolyte on characteristics of the coatings were investigated. ► The γ-Al2O3/Al2TiO5/TiO composite coatings can be prepared in the electrolyte with titania sol. ► The reactions of incorporated titania sol were proposed.