Titleist TSi2 fairway wood (David Dusek/Golfweek)

Available in 13.5-, 15-, 16.5-, 18- and 21-degree versions, the TSi2 was designed to deliver more speed and get the ball high into the air easily.

Titleist has added channels behind the leading edge in the sole of fairway woods for years, but the TSi2 was given an updated version with shorter walls. You can’t see inside the fourth-generation Active Recoil Channel (ARC) because it is covered by a polymer to keep grass, dirt and debris out, and it may sound like a minor detail, but making the channel walls shorter helped Titleist protect ball speed on shots struck low in the hitting area. At the same time, shorter walls are lighter, which creates more discretionary weight.

The TSi2 fairway woods have a polymer-covered channel behind the leading edge. (David Dusek/Golfweek)

Titleist also made the TSi2 fairway woods more aerodynamic, so golfers can swing the clubs faster with the same amount of effort. Designers also shifted the center of gravity down and farther back, away from the face, to encourage a higher launch angle. That also helped boost the moment of inertia, so the TSi2 fairways are more stable on mis-hits.

To ensure golfers can hit shots to the ideal distances, each club has a 16-position SureFit hosel that allows players and fitters to independently change the club’s lie angle and its stated loft by as many as 2 degrees.

The weight in the sole is not designed to be adjusted by golfers. It allows fitters to change the club’s swingweight based on custom lengths and player preferences.

Titleist TSi3 fairway wood (David Dusek/Golfweek)

Available in 13.5-, 15-, 16.5- and 18-degree versions, the TSi3 fairway woods were designed for golfers who have a more consistent swing and want distance combined with the ability to shape shots.

The TSi3 fairways have been given the updated Active Recoil Channel 4.0, a more-aerodynamic head shape and the SureFit adjustable hosel mechanism found in the TSi2 fairways. Still, golfers will immediately notice a difference in the two clubs when they compare the soles.

Removing the sole plate allows golfers and fitters to move the adjustable weight. (David Dusek/Golfweek)

The TSi3 was made with a three-position SureFit CG track system that houses a moveable weight. With the use of a torque wrench, a plate covering the weight system can be removed from the sole so players and fitters can move the weight into either the heel, toe or neutral setting.

Moving the weight shifts the club’s center of gravity, so the club develops a draw bias in the heel setting. Shifting the weight to the toe setting encourages a fade. In every setting, the TSi3 should produce a lower, more-piercing ball flight with less spin than the TSi2.

Some golfers will notice the weight-track system in the TSi3 driver is in the back of the club, while the track in the fairway woods is forward, behind the ARC 4.0 channel. Titleist pushed the weight forward in the fairway woods because they are smaller and shorter than drivers. Having the weight in the back would shift the ideal hitting area too high in the face. By designing it in a forward location, the sweet spot is centered in the hitting zone.