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Abstract
Laser treatments have been used to produce a series of surface layers containing up to ∼ 65 at.-%Al on a near α IMI685 titanium alloy substrate and a mixture of aluminium powder and silicon carbide was used to produce a surface composite layer based on titanium aluminides; also, silicon carbide particles have been incorporated into commercial purity titanium and a β Ti-15V-3Al-3Cr-3Sn alloy. Exploratory tests of oxidation and erosion resistance have shown the beneficial effect of surface alloying with aluminium and of ceramic particle injection. Microstructural observations have been made of samples fractured in bend tests.