Realizing the aircraft engine weight and performance promise of titanium aluminides has been a goal of materials engineers for the last thirty years.  Numerous alloy systems have been developed, but none have been introduced into full-scale production.  Impediments to implementation include the need to establish a complete database of design properties, design methodologies that accommodate the characteristics of titanium aluminides, and a cost effective supply chain.  Prior to addressing these items a specification had to be developed that identified a compositional range that could be measured and processed through a specified thermal cycle or cycles to produce repeatable mechanical properties.  After this, the first impediment to implementation could be addressed, General Electric has established a complete material database for TiAl alloy 48Al-2CR-2Nb which is currently in use by designers.  This presentation compares the properties of TiAl alloy 48Al-2CR-2Nb with competitive nickel base superalloys used in low pressure turbine applications.  TiAl alloy 48Al-2Cr-2Nb is very competitive with alternative nickel base materials and designs can be successfully executed within the property database.  The remaining challenge is therefore establishment of a cost effective supply chain, which is the subject of considerable effort by our colleagues at PCC.