Since you can't tame them it seems hard to get titanoboa eggs. However, you just have to build a small pen with open roof, get your argent/quetzal and drop some titanoboas in there. Since they won't despawn, you have an infinite source of kibble!!
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.