Titanium is extremely robust and about a third lighter than steel. In addition, it is skin-friendly and has a unique matte grey surface. But the metal is also challenging to machine. For many years, therefore, titanium was considered unsuitable for watch cases. Nevertheless, IWC accepted the challenge and, as a result of an intensive exchange with aerospace specialists, acquired the expertise needed to machine titanium. In 1980, the company produced the IWC Porsche Design Titanium Chronograph, Reference IW3700, the world’s first wristwatch in a titanium case. Two years later, this attractive material also featured in the Ocean 2000 diver’s watch, which was pressure-resistant to 200 bar and also the work of German industrial designer, Ferdinand A. Porsche. Over the next few years, IWC introduced a number of other innovative case materials, such as black ceramic, and established its material innovation leadership in the Swiss watch industry.