No, Thomas, there's not any medical or health reason to crop, per se... it's more of a personal preference. If Titus is just a pet, and you don't plan on showing or working him in competitions, then no, there's no need for it. Per the breed standard, the ears are preferred natural, but here lately, the dogs with cropped ears seem to be winning in the show ring more than dogs with natural ears.
Now, if your dog has a hemotoma, then cropping would be a viable option, depending on the location on the ear, I believe, but don't quote me on that. Lisa from Performance Kennels could better answer that question.