Paul wanted Titus to avoid stupid controversies, genealogies, dissensions, and quarrels about the law, since they are futile and useless. Titus was to avoid these factious sectarian heretical dissenters. If they did not respond after a couple of admonishments, then he was to have nothing to do with them. These dissenters are perverted and sinful, since they have already self-condemned themselves. Do you avoid stupid arguments?