Titleist 913D2 for Beginners?

I have the 910D2 and do think it is fine for a beginner.  Being able to adjust the loft and lie really helps as your swing evolves.  I do recommend getting fitted for a good shaft.  The stock Diamana  shafts are a bit softer than you would expect.  The regular Kai'li is really for a swing speed of ~85 max.

Mis hits definently will be amplified compared to a more foregiving driver like the G20.

Not sure about the G20, but the Titleist 910D2 was about the same as the G15.  I have had both and like the D2 better.

Even the tour driver's, most of them are 440cc even 460cc, maybe a slightly less deeper face for more maneuverability, but honestly, today's drivers, anyone can hit any driver out there. 

I played a ping G10 and switched to a 910D2. The G10 was less maneuverable, it's a pretty much meat and potatoes type of driver, you know what you get. The 910D2, if i wanted to i could curve the ball a bit more, i've actually curved it quite a lot. But that's not to say its not meant for higher handicappers as well. Of course some driver's are a slightly better for certain handicaps than others. I would say Titleist plays towards the professionals to the mid handicappers, but that's not it can't be used successfully by any handicap. 

Go for it. Titleist is a solid name, and the value of your club should last a while.

But I would also suggest that if you are looking for a new driver, that you should try out as many as you can at a golf shop.

The right shaft flex is important of course, but I would also pick a driver head according to how consistently I could hit it well, and there are more things than a larger sweetspot that can help this.

Things like how the head looks at address, the feel of the weight of the club in your swing, the sound of the head hitting the ball.

Those things can affect your swing too.
 

But If I was buying a club for a family member, and money was no issue, I'd also buy a large 460cc head from a reputable name.

Why not?

I hit the 913D2 in a 12 degree head and Bassara shaft - it was a very controllable, yet long club.

Don't know your age, but you might consider a 10.5 so you can crank it up to 12 degrees, and then take it back down as your game improves.

Same with the shaft - go for something that is as flexible and light as you can control -- you can change it later as your swing gets stronger.

What you don't want to do is get something that is low lofted, which produces sidespin, and a shaft that is too strong which may produce low, inconsistent shots and make you swing out of your shoes.

There's alot more to shaft than just stiffness. 

Overall a golf club can be a stiff flex, but can vary greatly between brands and models. A great guide is on Titleist website, check out there 910D2 page and look at there custom guide. Gives a great graph of golf shafts and launch versus spin. really gives you a good idea as to were a golf shaft lies.

General rule of thumb

Heavier the shaft in the same model type, stiffer it will be. So a heavy regular flex will be similar to a lighter stiff flex

Some stiff flexes can have higher launch angles because there kick point is different, same goes for spin rate. but generally, the stiffer the flex, the lower the launch and lower the spin.

Meaning, if you have a fast swing speed, your probably looking at a stiffer shaft, one it tightens dispersion due to unwanted shaft flexion. Two, it maximizes energy transfer at the right moment. Basically, to stiff a shaft and you might never transfer all the energy, and not enough stiffness and you might transfer it to late, or transfer it to early.

My driver swing speed is around 110-120, and i play the Titleist A'hina 72 stiff flex shaft. I love it, launches the ball on a great trajectory, not to high, not to low. But i know for my swing, i want to stay in those bottom left quadrants, because the higher the swing speed, the more spin you generate. Spin for a driver can really kill distance by causing it to stay in the air to long, or get caught by the wind. Spin helps out slower swing speeds, because there velocity doesn't generate much carry, so higher spin helps them gain more carry.