Titanium alloy is a good material with high specific strength and good corrosion resistance. It is often used in aircraft design, but it is more difficult to process this material, especially for special-shaped parts. Fortunately, the emergence of 3D printing technology has solved this problem well.
Titanium alloy is often used not only in aviation equipment, but also in navigation equipment. Russia has built a titanium alloy submarine, which can dive to more than 1000 meters below the sea, making it more concealable.
Today, China's deep-sea manned submersives also use titanium alloy, and the depth of the submersives is far more than 1,000 meters. For example, China's "Endeavor" deep-sea manned submersives have completed all 10,000-meter sea trial missions in the Mariana Trench area of the Western Pacific Ocean, and set a new Chinese manned deep diving record of 10,909 meters. More than 10,000 meters below the surface, the water pressure is more than 110 megapascals, the equivalent of having 2,000 African elephants on your back. With that kind of pressure, how is the Striver going to be able to withstand the hard core?
And that's the crew module. In order to ensure the capacity of passengers, the manned cabin should be large; In order to reduce the burden of the submersible, the ball cabin should not be heavy; The manned capsule must be strong to withstand the sea pressure of 10, 000 meters. And because they have to be soaked in water for a long time, conventional materials are easy to rust and be corroded, and may be discarded in a short time.
Finally, a new type of homemade titanium alloy material has emerged that can withstand the strong pressure at the bottom of the sea while providing excellent corrosion resistance. There was no precedent for this welding technique anywhere in the world. To ensure the success of the project, five hemispheres were prepared for the "Striver" project: one for the test and four for two balls.
