The objective of Greater Operating Temperature Alloy [GOTA] was to select a titanium alloy capable of being fabricated into intermediate compressor casings, and enduring operating temperatures of at least 500 deg C in this service. Industrial manufacture of the selected alloy was demonstrated, by the production of rolled rings; gravity cast and centrifugally cast samples; sheets, welding wire, and welded samples.

• TIMET UK Ltd., [TIMET] was the Principal Participant, and led the Management of the project.
• Swansea University led the review of literature and prior industrial work. A candidate alloy (Ti+) was selected based on this review, and on commercial and industrial factors.
• TIMET supplied Ti+ billets to Forgital Italy S.p.A. which will manufacture, heat treat, and sample rolled rings.
• TIMET supplied Ti+ casting stock to Deritend International, which manufactured stepped section cast samples by both gravity and centrifugal casting, aiming to overcome the prior low ductility reported in castings of highly creep resistant titanium alloys.
• TIMET manufactured sheet; welding wire, and welded samples of the Ti+ alloy. Significant process development work is required in this task.
• Swansea University tested the samples of the candidate to generate a database of mechanical properties for this titanium alloy in cast, wrought and welded forms and analyse the samples to rationalise the test results.
• The tests consisted of tensile; creep; LCF; and fatigue crack propagation tests at both room temperature and 500 deg C. Also, tensile tests were repeated after exposure to air at 500 deg C for extended time periods, to check for deterioration in ductility.
• TIMET UK Ltd., led the reporting of the project, and the Participants disseminated the results through industrial meetings with potential end users (principally Volvo Aero and Rolls Royce) and through publications in academic journals and conferences.