There are many ongoing U.S. aerospace programs which have identified requirements for higher temperature capability from conventional titanium alloys. In order to meet these requirements, two new titanium alloys have been developed. A near alpha alloy, designated "Ti-1100" (Ti-6Al-2.7Sn-4Zr-0.4Mo-0.45Si), is a modification of the well known Ti-6242S alloy (Ti-6Al-2Sn-4Zr-2Mo-0.1Si). It offers roughly a 55°C (100°F) creep advantage over the older alloy and is currently being considered for sheet metal and forging applications in both turbine engine and airframe applications. On the other hand, a metastable beta alloy designated "Beta-215S" (Ti-15Mo-2.7Nb-3Al-0.2Si) has shown exceptional promise as a matrix in metal matrix composites for high temperature applications. Its key attributes are its ease of processing in foil production and its excellent oxidation resistance. This paper will review the development of these alloys and some of their more important mechanical properties.