It doesn’t do time stretch or slicing on its own. There are ways around it, though.
You can sort of mess with the LFO to get a time stretch of sorts, just playing with the start point of the sample to make it match the bpm of the track. It works, but you’ll know that this is not really time stretch as you want it to be. In the end, I think this workaround is more a clever trick than a way to say “Look, it time stretches, just differently!”
Slicing can kind of be done. Not automatically, but the granularity of the encoders make it really easy to located start points of the samples, and by using p-locks, you can then switch between different points of a sample within the same track, as you would with slices.
But again, you’ll know it’s not the convenience of proper slicing as such. It’s just that you can work with slices and the idea of them, but very differently.
If these are killer features for you, I’d recommend to approach the DT with some caution. The OT is superior in these regards.