Will a Thunder Tiger .46 make the H-9 Twist a good 3-D plane? If so what prop?

It should be fine. Try an APC 12.25-3.75 prop. I have flown them with OS .46AX, Evo .46 and Tower .46 so the TT .46 should be a good choice.

The Twist is a flat spinning fool and does great waterfalls.

Not sure about the TT46 but should be OK...
I have an OS 46ax with a 12x4 Zinger prop with 394 HARD 3D
flights on my Twist.. It is a very strong plane.. well built..
Not the best at 3d but certainly FUN...
Install the battery over the tank to balance..

HAVE FUN...[8D]

I agree with Ed. I have a OS 50SX on mine, it's an absolute rocket.

I also have a twist with a OS .46 ax and I am pretty sure I'm using a 12x6 and that plane does everything I ask and more. Unlimited vertical from a hover. Don't know about a TT but should be ok.

put your .61 in it

Im running a 46AX on my twist with a tower muffler, All I can say is WOW!! it was good before I put the muffler on, now its insane.
Im running the APC 12 1/4 x 3 3/4.

How much does your twist weigh???