Including a new ‘ATI 425 Aerospace Titanium’ face construction never before used in golf, the TSi drivers are the longest, straightest, best-looking, and best-sounding Titleist drivers ever.

Available in Australian golf shops November 12, with fittings beginning October 16th at locations nationwide, the new TSi2 and TSi3 models transcend the advancements of the original Titleist ‘Speed Project’, accelerating the performance that has made Titleist the most played driver on the PGA Tour for two seasons running.

From the top of the swing, TSi’s player-tuned aerodynamics propel the clubhead faster toward the golf ball. At impact, the extremely powerful ATI 425 face launches the ball at speeds never before possible. High inertia properties produce an extremely stable clubhead, providing players with more consistent speed and spin across the face for longer, straighter drives:

TSi2 is designed to deliver incredible speed and accuracy across the entire surface of the face, with a deeper, lower CG to maximize distance, while TSi3 is for players capable of creating more consistent contact or requiring more precise control over CG placement, featuring a new ‘SureFit CG Track Design’ for advanced speed-tuned performance.

“TSi is simply better when it comes to all four fundamentals of driver design – distance, accuracy, looks and sound,” said Josh Talge, Vice President, Titleist Golf Club Marketing. “We continue to make every investment necessary to help players achieve the speed and distance gains they are asking for, without having to make any sacrifices when it comes to performance. ATI 425 is an incredible breakthrough for driver performance, but it’s just one piece of the puzzle. Every aspect of TSi has been optimized to benefit the total package, and it’s the integration of all those parts that drives greater ball speed and an experience at impact that tour players can’t stop talking about.”

The first week that TSi drivers were made available on the PGA and European Tours in early September, a total of 57 players immediately made the switch, with more players choosing TSi drivers than any other model across the two events. The following week at the U.S. Open, TSi was the most played driver at Winged Foot.

Accurately tuned for speed at every point of contact, TSi driver faces are constructed from ATI 425 Aerospace Titanium, a unique material that delivers superior strength, elasticity and durability versus the conventional titanium alloys used in golf. The exceptional ductility of ATI 425 (30 percent higher than 6-4 Titanium) allowed engineers to create the thinnest Titleist driver face yet – accelerating ball speed while maintaining the durability properties required for consistent maximum performance.

“ATI 425 is an amazing alloy that leads to a lot of performance benefits,” said Dan Stone, Senior Vice President, Titleist Golf Club R&D. “It’s incredibly strong and maintains elongation under high stress. It let us optimize the thickness of the entire face to a degree that was never possible before and generate our highest ball speeds ever at points all over the face, not just heel and toe but also high and low. This is an extremely difficult material to work with, but the benefits to the golfer are too great and beyond anything we’ve ever seen.”

Made by a single foundry in Pittsburgh, ATI 425 was initially developed for ballistic armour and has since been used in many aerospace and industrial applications, including NASA’s Phoenix Mars Lander. Titleist is the only company in golf that uses this material.

The TSI face also features a new high-contrast graphic design that accentuates face centre for easy alignment at address.

The improved aerodynamic shaping of TSi drivers allows the clubhead to move faster through the air – from the top of the swing to the ball – and deliver a more powerful impact. The shape of each TSi driver model has been aerodynamically optimized to reduce drag up to 15 percent, increasing clubhead speed for greater ball speed and distance.

TSi is also tuned to feel fast in a golfer’s hands, with meticulous sound engineering managing vibrations within the clubhead to deliver a Tour-quality sound. The enhanced shaping of TSi includes a softer toe requested by tour players that looks square at address.

While golfers often equate “high MOI” with heel to toe forgiveness, Titleist R&D employs a more holistic approach to moment of inertia (MOI) design. TSi also optimizes sole to crown performance, producing up to 13 percent higher inertia values that deliver more speed and a tighter spin range up and down the face.

TSi’s speed-optimized MOI works in concert with a low and deep centre of gravity (CG) position to drive faster ball speed with a high launch, low spin trajectory and exceptional stability for greater distance consistency.

The new TSi3 model features a new SureFit CG track technology that offers five unique positions to adjust club head CG and fine-tune ball flight. The track offers more precise incremental adjustments – H2 (most heel biased), H1, Neutral, T1, T2 (most toe biased) – allowing a player to dial-in their launch conditions.

Both TSi2 and TSi3 feature Titleist’s patented ‘SureFit’ hosel with 16 independent loft and lie settings, plus headweight adjustability to create a more consistent and optimized ball flight through precision fitting.

Every TSi driver is precision manufactured to the tightest tolerances and measured multiple times to ensure performance is at the maximum allowable limit.

TSi has become the most played driver on both the PGA and European Tours since being introduced to players the second week of September. In total, more than 150 players across the worldwide professional tours have played new TSi2 or TSi3 models in competition over the past five weeks. There are currently 20 players in the Official World Golf Rankings Top 100 carrying a new TSi model, including four in the OWGR’s Top 20 – Justin Thomas (TSi3) and Adam Scott (TSi3), in addition to two others playing TSi3 without an agreement.

Among the Titleist players transitioning into the new TSi2 are Cameron Davis, Tyler Duncan, Lanto Griffin, Chesson Hadley, Brian Harman, Tom Hoge, Mark Hubbard and C.T. Pan. Those choosing to play the new TSi3 include: Ben An, Rafa Cabrera Bello, Lucas Bjerregaard, Bud Cauley, Charley Hoffman, Max Homa, Charles Howell III, Patton Kizzire, Peter Malnati, J.T. Poston, Ian Poulter, Robby Shelton, Cameron Smith, Scott Stallings, Jordan Spieth, Jimmy Walker, Bernd Wiesberger and Will Zalatoris.

TaeHoon Kim was the first Titleist player to win with a TSi driver when he captured the Korean PGA Tour’s Genesis Championship with a TSi2 (9.0), as well as a TSi2 (15.0) fairway metal.

“TSi just looks fast and it sounds like a missile coming off the face,” Justin Thomas said. “When I first tested it I hit one drive off the toe and it carried almost 20 yards further than I would have thought. That’s what we want is the bad ones to perform better. Those weeks where I’m not hitting it consistently in the middle of the face, I feel like [this TSi driver] is going to have the opportunity for me to narrow my window and dispersion … The fact that it is faster without giving anything up – I can’t believe how much it’s improved when it already seemed to be the best that it can get.”

SRP: $849 (Available November 12).

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