This lecture provides a comprehensive overview of titanium metallurgy, covering topics such as the primary production process from titanium ores, the different allotropic configurations of titanium, the types of phase diagrams with titanium, and the interstitial solid solutions of oxygen, nitrogen, and hydrogen in titanium. The instructor discusses the abundance of titanium in the earth's crust, the production methods, the annual worldwide production, and the technical importance of interstitial solid solutions. The lecture also touches upon the cost factors associated with titanium production and the ongoing research in alternative production methods.