Titleist · Driver · 2021 · Previous model
Titleist TSi1 driver
Driver, 3.0 of 5 for forgiveness
Titleist's 2021 lightweight driver for swing speeds under 90 mph: a 460cc head almost 40 grams lighter than a standard driver, with the most draw bias of any Titleist driver then, in 9°, 10° or 12°. Titleist no longer sells the TSi1 new; the TSR1 followed it, and the GT1 is the newest model in its line.
3.0 of 5 forgiveness score
$131.99 used at 2nd Swing Golf
In average condition or better: from $219.99
New instead: Titleist GT1, $449 at Titleist, checked 16 Oct
Choose it if
- You swing a driver under 90 mph and want a light driver with a draw bias.
- You slice: the head has a draw bias built in.
- You need a left-handed club or a senior flex: both were stock builds.
Choose something else if
- For a left-handed 9° or 12°, choose another driver: the left-handed TSi1 came in 10° only.
- Stock lofts
- 9° · 10° · 12°
- Slice help
- Draw bias built into the head
- Stock flexes
- Senior to stiff
- Hands
- Left or right; left-handed in 10° only.
- Used
- From $131.99 at 2nd Swing Golf, checked 31 Oct
What changed in the GT1
Titleist followed the TSi1 with the TSR1 in 2023 and the GT1 in 2025. Both are lightweight 460cc heads for moderate swing speeds, in 9°, 10° and 12° with a 59° lie. The TSi1 came left-handed in 10° only, on Aldila's Ascent shaft, with an ultra-thin titanium crown, a face in ATI 425 aerospace titanium and its weight set for the most draw bias of any Titleist driver then. The GT1 comes in every loft in either hand, with a polymer crown, a titanium ring around the face, the deepest centre of gravity of the GT drivers for a higher launch, one interchangeable back weight and three featured shafts. Titleist gives neither head a forgiveness class, so the TSi1 and the GT1 both score 3.0 here.
Titleist no longer sells the TSi1 and we found no shop selling it new, but used ones cost a fraction of a new GT1. Choose a used TSi1 for a light Titleist head with a draw bias for little money; choose the GT1 for a left-handed 9° or 12°, the back weight and the wider choice of shafts.
| Detail | TSi1 (previous) | GT1 (current) |
|---|---|---|
| Forgiveness score | 3.0 of 5 | 3.0 of 5 |
| Stock lofts | 9° · 10° · 12° | 9° · 10° · 12° |
| Slice help | Draw bias built into the head | None stated |
| Stock flexes | Senior to stiff | Ladies to extra stiff |
| Hands | Left or right; left-handed in 10° only | Left or right |
| Price new | No longer sold new | $449 at Titleist, checked 16 Oct |
| Price used | From $131.99 at 2nd Swing Golf (12°, regular flex, poor condition), checked 31 Oct | From $271.99 at 2nd Swing Golf (12°, senior flex, below average condition), checked 31 Oct |
Build a whole bag around it, or check the lofts in the bag you carry.
The Titleist TSi1 came in a senior (A) flex as well as regular (R): what the senior flex changes, and who it suits.
TSi1: the questions buyers ask
- Is the Titleist TSi1 forgiving?
- Moderately. It has lofts up to 12°. It scores 3.0 of 5 on our reading of what Titleist publishes about it; the most forgiving drivers we cover score 4.0.
- Who is the TSi1 for?
- It suits golfers who swing a driver under 90 mph and want a light driver with a draw bias.
- Does the TSi1 come in senior or ladies flex?
- Senior, yes; ladies, no. Titleist listed senior (A), regular (R) and stiff (S).
- Is the TSi1 sold left-handed?
- Yes, at 10°; Titleist made the other lofts right-handed only.
- How much does the TSi1 cost?
- Titleist no longer sells it new. Used from $131.99 at 2nd Swing Golf, checked 31 Oct. In average condition or better, from $219.99. Prices change; the seller's page has today's.
How the 3.0 adds up
The forgiveness score is our reading of what Titleist publishes about the head, from 1 to 5. It is not a test result. How every score works.
| Part | Points | Why |
|---|---|---|
| Head | 3 | A driver head Titleist named no forgiveness class for. |
| Forgiveness score | 3.0 | of 5 |
Draw help, lofts, flex and hand don't change the score. They decide which version fits you, and the picks for a slice or a slow swing use them.
Specification sheet
| Maker | Titleist |
|---|---|
| Model | TSi1 |
| Model year | 2021 |
| Type | Driver |
| Class | – |
| Who it suits (our reading) | Slower swings |
| Handicap range the maker states | – |
| Offset | – |
| Sole | – |
| Moment of inertia (MOI) | – |
| Face technology | ATI 425 aerospace titanium face; the thinnest cast titanium crown Titleist had made |
| Construction | A light 460cc head with an ultra-thin titanium crown, a face in ATI 425 aerospace titanium and its weight set deep, close to the centre of the face, and a 59° lie. |
| Stock steel shafts | – |
| Stock graphite shafts | Aldila Ascent (35/40/50) |
| Stock flexes | A (senior), R (regular), S (stiff) |
| Stock lofts | 9° · 10° · 12° |
| Hands | Left or right; left-handed in 10° only. |
| Men's or women's | Men's |
| List price when new | $549 (2021 model); not a price today |
| Price at Titleist | – |
Compare with other drivers
No matching clubs. Clear the search or loosen the filters.
| Lofts | Slice help | Hand | Where to buy | |||||
|---|---|---|---|---|---|---|---|---|
| 4.0 | Maximum forgiveness | 10.5° · 12° · 15° | Draw-biased head, built to reduce a slice | A · R · S | RH · LH | $299.99 at Tour Edge checked 2 Nov | ||
Cobra OPTM MAX-D (2026) | 4.0 | Maximum forgiveness | 10.5° · 12.0° | Draw-biased head, built to reduce a slice | A · R · S · X | RH · LH | $399 at Cobra checked 2 Nov | |
Cobra OPTM MAX-K (2026) | 4.0 | Maximum forgiveness | 9.0° · 10.5° · 12.0° | – | A · R · S · X | RH · LH | $399 at Cobra checked 2 Nov | |
| 4.0 | Maximum forgiveness | 9.0° · 10.5° · 12.0° | Slight draw bias built into the head | A · R · S | RH · LH | $399.99 at Srixon checked 2 Nov | ||
| 4.0 | Maximum forgiveness | 9° · 10.5° · 12° | Draw setting on the adjustable weight | A · R · S · X | RH · LH | $447 at Golf Discount checked 2 Nov | ||
| 4.0 | Maximum forgiveness | 9° · 10.5° | Draw-biased head, built to reduce a slice | A · R · S · X | RH · LH | $447 at Golf Discount checked 2 Nov | ||
Wilson DYNAPWR Max+ (2026) | 4.0 | Maximum forgiveness | 9° · 10.5° · 12° | – | A · R · S | RH · LH | $499.99 at Wilson checked 2 Nov | |
| 4.0 | Maximum forgiveness | 9° · 10.5° · 12° | Draw setting on the adjustable weight | A · R · S · X | RH · LH | $647 at Golf Discount checked 2 Nov |
Order: Most forgiving in this class first, then price. Use the arrows to sort. A dash means the maker does not publish it.
See all drivers on the most forgiving driver page, or compare this club side by side. Waiting for a sale? The Black Friday golf club deals page has the price to beat on every club we price.
Sources
The specification comes from these pages; open the maker's page before buying, because prices and shaft options change. Check the exact shaft and hand at the shop before ordering.
- Titleist's specifications (price checked 16 Oct)
- Titleist media center's announcement
- Titleist's page on availability (checked 16 Oct)
- Golf Discount's search results (checked 16 Oct)
- 2nd Swing Golf's used listings (checked 31 Oct)
- Pre-owned: seen at 2nd Swing Golf from $131.99 (checked 31 Oct)