Titleist TSi2 and TSi3 drivers

The Titleist TSi2 driver is designed to optimize speed and stability. (David Dusek/Golfweek)

Available in 9-, 10- and 11-degree versions, the TSi2 is an all-titanium, 460-cc driver with a classic glossy-black crown and adjustable hosel mechanism. Golfers and fitters can independently increase or decrease the club’s stated loft by as many as 2 degrees.

What golfers can’t see are the subtle aerodynamic improvements Titleist has made with this upgraded driver. According to the company, it produces 15 percent less drag on the downswing than the TS2 it replaces – golfers can swing it faster with the same effort.

Titleist TSi2 driver

The ATI 425 titanium alloy used in the face bends more than other titaniums without breaking. (David Dusek/Golfweek)

To take full advantage of that speed, Titleist has given the TSi2 a face made from ATI 425, a titanium alloy that can bend without breaking more than other titaniums used in golf. Previous applications for ATI 425 were in ballistic armor and the aerospace industry, including on NASA’s Mars lander, and Titleist said it is the only company using it in the golf industry.

The TSi2 is also designed to maximize forgiveness. More weight was moved to the back of the head to increase stability and encourage a higher launch angle.

A flat adjustable weight in the back of the sole is not designed to be removed by golfers. It allows fitters to tweak the swing weight more easily based on the club’s length and the golfer’s preferences.

At the same time, designers also worked to increase the moment of inertia, not only from heel to toe but also up and down. As a result, golfers can expect better performance on shots hit slightly high or low in the face.

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