Matching two different key's tracks in Cross

Hi - just hoping - I've got two tracks I'm loving and really want to mash together, just try as I might the key clash is too strong. They're close but the harmonic content just jars in places
Is there a way with Cross I can beat lock the two tracks and pitch bend one of them up (or better still, pitch one down slightly and the other up slightly - that might work even better ? - ones 12A and the other 4A?) I've tried the various MT/SPEED/HYBRID pitch fader settings but am not sure I'm understanding them right how they work with the tracks
Is there a way with Cross I can beat lock the two tracks and pitch bend one of them up (or better still, pitch one down slightly and the other up slightly - that might work even better ? - ones 12A and the other 4A?) I've tried the various MT/SPEED/HYBRID pitch fader settings but am not sure I'm understanding them right how they work with the tracks