Titleist 690 CB. The Forged 690CB (Cavity Back) is a high performance, modern cavity back forged blade. The slightly longer and deeper blade, in combination with the cavity back design produces a slightly higher trajectory and is easier to hit than the 690MB (Muscle Back) irons. It also features stronger lofts, slightly more progressive offset and a wider sole with moderate camber and strong bounce angle. Forged from 1025 mild carbon steel with a bright chrome finish the Titleist Forged 690CB irons provide classic good looks, solid feel and shot shaping performance.