If you put on 'Target Conscious Only' they will not attack KO'd creatures. However, Scorpions are more effective for KO taming, as you can control the amount of stings to not kill the creature, which a Titanoboa will not regulate attcks.
Ok don't you think when this is tamed it should have a special setting to where the Titanboa should be able to knock out your target instead of killing it. I don't know it might just be me.