Ceramic oxide coatings were fabricated on a Ti6Al4V alloy surface by micro-arc oxidation (MAO) in Na2SiO3-KOH-(NaPO3)6-NaAlO2 solution using an AC power supply. Microstructure, phase and composition of ceramic coatings were characterized by SEM and XRD respectively. Mechanical properties were studied using a Nano Indenter XP system. The results show that ceramic coatings possess three layers transitional, dense and loose layer, composed mainly of rutile TiO2 and a small amount of anatase TiO2. Elastic recovery is 40.5% and 14.9%, hardness is 8.54 GPa and 5.5 GPa, and elastic modulus is 87.4 GPa and 150 GPa in the dense layer and the substrate, respectively, The MAO coating indicates pronounced ceramic characteristics.