11,000m Hadal Titanium Submersible Pressure Hull Model

Underwrite electron-beam welded 90mm thick forged Ti-6Al-4V Grade 5 titanium spheres rated for 1,140 bar hydrostatic pressure at 11,000m depth (carrying 3 researchers to the deepest points of all ocean trenches with infinite fatigue cycle life). Model sovereign deep-ocean science exploration charters ($450k/dive), and equipment payback.