- Collection:SHEET TITANIUM - A combination of 100% pure titanium and beta-titanium. For bolder, go Tron: a fabulously sized up version of our titanium bestseller Natassja, revived in an exhilarating color range, from three two color combinations on the front to Ørgreen's signature alternate inside outside color stories. Browns, navy, and rose take the center stage of a larger but lighter optical frame: our feminine temple design adds an elegant touch, while our ground breaking rolled up titanium sheet technique allows for minimal thickness as low as 1,8 mm on the front. What remains is the classic Ørgreen top line and extra comfortable nose pads and end tips.