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.
You can pick these up with an argy, and fly to an enemy or an enemy base and drop it in there. The tribe log will only say a wild titanaboa killed their Dinos. This doesn’t work if they aren’t on passive