Hard and wear resistant titanium alloy and preparation method thereof

A hard and wear resistant titanium alloy, comprising:

• a Ti-6Al-4V substrate coated by a glass-ceramic composite of SiO2—Al2O3—ZrO2—Y2O3—K2O—Na2O—B2O3,
• wherein the composite comprises silicon dioxide (SiO2) of 51 mole %, yttrium (III) oxide (Y2O3) of 2.4 mole %, potassium carbonate (K2CO3) of 4 mole %, sodium carbonate (Na2CO3) of 6 mole %, zirconium dioxide (ZrO2) of 5.6 mole %, boric acid (H3BO3) of 20 mole %, and aluminum oxide (Al2O3) of 11 mole %, and
• wherein the substrate comprises aluminum (Al) of 5.83 wt %, vanadium (V) is 3.86 wt %, copper (Cu) of 0.15 wt %, molybdenum (Mo) of 0.43 wt %, stannum (Sn) of 0.35 wt %, niobium (Nb) of 0.35 wt %, palladium (Pd) of 0.15 wt %, iron (Fe) of 0.15 wt %, and titanium (Ti) of 90 wt %.