In 2010, Titleist offered two multi-material, dual-cavity sets, the Titleist AP1 712 Irons and the AP2.
Titleist AP1 712 Irons:
The Titleist 2010 AP1 Irons are cast from 431 stainless steel and feature a tungsten nickel box that is laser welded to the body and is located in the back and sole of the iron. It covers the lower cavity and is designed to keep weight lower while giving players both good feel and added forgiveness. This lower center of gravity gives players a higher launch angle with more ball speed and what Titleist calls "consistent spin performance across the hitting area." The upper cavity sits above the elastomer cushion and is adorned with a metallic cavity plate. Weight is pushed to the perimeter to give you increased forgiveness.
The dual cavity and multi-material design are a radical departure from anything Titleist has made in the past and have been designed with one key bit of player feedback at the forefront: feel. They are designed for those of us who are in the double-digit handicap range. We show flashes of our golfing potential, but still have an evolving golf swing that could use a little forgiveness while still providing feedback to help us improve.
Titleist AP2 712 Irons:
The new Tuned Feel System is a co-molded medallion of soft elastomer and aluminum plate. This insert has been specifically designed to improve the sound and feel of each new iron. For the Titleist 2010 AP2 Irons, a softer, more solid feel is achieved. Dual Cavity design pushes weight to the perimeter for playability without loss of shot shaping control. Reduced bounce sole delivers improved ground contact.
High technology design and construction featuring a forged steel body, tungsten nickel box and Tuned Feel System enhances performance and feel. The integrated aluminum and soft elastomer Tuned Feel System in the back cavity improves sound and feel at impact. A soft, forged carbon steel body with a high density tungsten nickel sole.