['The', 'intermetallic', 'phase', 'of', 'Al3Ti', 'forming', 'during', 'the', 'above', 'processing', 'gives', 'high', 'hardness', 'and', 'stiffness', 'to', 'the', 'composite', ',', 'while', 'unreacted', 'titanium', 'provides', 'the', 'necessary', 'high', 'strength', 'and', 'ductility', '.']