Titanium is a chemical element with symbol Ti and atomic number 22. It is a lustrous transition metal with a silver color, low density and high strength. It is highly resistant to corrosion in sea water, aqua regia, and chlorine.
T 3764 (OTTO) Titanium sputtering target, diam. × thickness 2 inch × 0.125 inch, 99.995% - used in making of the camera shutters, a most unseen and unknown device hidden inside a camera that allows light to pass for a short period of time, for the purpose of exposing film or an electronic sensor to light to make a photo.