What are the past, present and future uses of Titanium?

Present- Titanium is used in steel as an alloying element (ferro-titanium) to reduce grain size and as a deoxidizer, and in stainless steel to reduce carbon content. Titanium is often alloyed with aluminium (to refine grain size), vanadium, copper (to harden), iron, manganese, molybdenum, and with other metals.Applications for titanium mill products (sheet, plate, bar, wire, forgings, castings) can be found in industrial, aerospace, recreational, and emerging markets. Powdered titanium is used in pyrotechnics as a source of bright-burning particles. Due to their high tensile strength to density ratio,high corrosion resistance, fatigue resistance, high crack resistance, and ability to withstand moderately high temperatures without creeping, titanium alloys are used in aircraft, armor plating, naval ships, spacecraft, and missiles. For these applications titanium alloyed with aluminium, zirconium, nickel,vanadium, and other elements is used for a variety of components including critical structural parts, fire walls, landing gear, exhaust ducts (helicopters), and hydraulic systems.

In short titanium is used for-

Pigments, additives and coatings

Aerospace and marine

Industrial purposes

Consumer and architectural

Jewelry

Medical

Nuclear waste storage

Past- In the 1950s and 1960s the Soviet Union pioneered the use of titanium in military and submarine applications (Alfa Class and Mike Class)[32] as part of programs related to the Cold War.[33] Starting in the early 1950s, titanium began to be used extensively for military aviation purposes, particularly in high-performance jets, starting with aircraft such as the F100 Super Sabre and Lockheed A-12.

In the USA, the Department of Defense realized the strategic importance of the metal[34] and supported early efforts of commercialization.

Future- Ocean Thermal Energy Conversion (OTEC) plant

　As an alternative energy source, OTEC is the focus of increasing attention. Taking advantage of the ocean’s natural thermal gradient, the closed-cycle type of heat engine system uses the circulation of a mixture of ammonia and water to drive the power generators. In order to realize this power generation technology, the extensive use of durable, seawater-resistant titanium for pipes and various heavy equipment will be essential.

●Ultra-large-scale floating-type offshore structure (Mega Float)

　Giant structures floating offshore and capable of serving as airports and other purposes are envisioned for the future. For such a project, the materials would have to endure for a long period of time — over a century. The high corrosion resistance of titanium will be ideal for the sides of the floats and other areas that may be exposed to seawater.

*Hope it helps, I did a lot of hardwork writing this*

It has great resistance against most of chemicals

---Ti would be used as containers and pipes for chemical plants.

It is light than steel but even stronger

---It could be used as structure materials that need to be strong but low weight. So, now, its widely used in aerospace industry. But in the future, when it gets cheaper, it could be used more in submarines, even tanks.