This chapter discusses the basic principles of alloying and their practical application in the production of titanium mill products and engineered parts. It begins with a review of the atomic and crystal structure of titanium and the conditions for interstitial and substitutional alloying. It then describes the different classes of alloying elements, their effect on mechanical properties and behaviors, and their influence on phase transitions and transformations. The chapter also discusses the role of intermetallic compounds and their effect on crystal structure and creep behavior.

This appendix provides tensile property data for titanium alloys and castings and plane-strain fracture toughness data for Ti-6Al-4V castings.

This appendix provides datasheets describing the chemical composition, processing characteristics, mechanical and fabrication properties, and heat treating of various grades of alpha-beta titanium. Datasheets are provided for the following alloys: Ti-5Al-2Sn-2Zr-4Mo-4Cr (UNS: R58650, Ti-17); Ti-6Al-2Sn-4Zr-6Mo (UNS R56260, Ti-6246); Ti-6Al-4V (UNS R56400) and Ti-6Al-4V ELI (UNS R56401); Ti-6Al-6V-2Sn (UNS R56620, Ti-662); Ti-7Al-4Mo (UNS R56740); Ti-6Al-1.7Fe-0.1Si (TiMetal 62S); Ti-4.5Al-3V-2Mo-2Fe (SP-700); Ti-6Al-7Nb (IMI 367); Ti-4Al-4Mo-2Sn-0.5Si (IMI 550); Ti-4Al-4Mo-4Sn-0.5Si (IMI 551); Ti-6Al-2Sn-2Zr-2Mo-2Cr-0.25Si (Ti-6-22-22S); Ti-5Al-2.5Fe (DIN 3.7110, Tikrutan LT 35); and Ti-5Al-5Sn-2Zr-2Mo-0.25Si (UNS R54560, Ti-5522-S).