Mechanical and ballistic properties of selected titanium alloys used in modern armor systems: Ti6Al4V is an alpha-beta titanium alloy comprised of 90% Ti, 6% Al, and 4% V. It has a density of 4.43g/cm3, a hardness of 334HB, a yield strength of 880MPa, tensile strength of 950MPa, charpy impact at 17 J, and elongation at 14% in 2″.