I disagree. Calling somebody a respectful title isn’t just a recognition of his job, it is a gesture of respect. If somebody is a Talmid Chochom, then you have an obligation to respect him. That applies both in and out of a professional environment, whether it suits you or not. Life isn’t about psychological power struggle to
use manipulative behavior to discomfit another person or gain an advantage over them. Your chiyuv of respect is regardless of the situation or context of reception.
If this will cause you a monetary loss, ask your LOR. Otherwise, the satisfaction of winning a mind game isn’t worth sacrificing halacha.