Squale Watch Master Titanium MASTIBKBK.TI20. The Squale Master is the first Squale timepiece to be made entirely of grade 5 Titanium. This material, unlike 316L steel, allows for an extremely light watch without altering its technical characteristics. The 4mm-thick glass and the helium escape valve made it possible to create a product capable of resisting up to 120 ATM.