The first mention of Titus is in Galatians 2:1-3, when he accompanied Paul on the “famine visit” to Jerusalem. At the time, Titus was uncircumcised but was still accepted as a Christian. For nearly the next twenty years, Titus was a faithful assistant of Paul. There was probably little new in this letter that Titus had not heard many times before.
At the time of the writing of this letter, Titus was in Crete and Paul was spending the winter in Nicopolis, a major city on the west coast of Greece. Paul wanted Titus to get things in order with the many churches in Crete before joining him in Nicopolis. Paul is nearing the end of his life, and you can sense the urgency in his words.
One of the reasons Paul left Titus in Crete was to appoint elders in the many towns, and the qualifications Paul describes for elders are similar to those in First Timothy. Based on Titus 1:6-9, it was not going to be easy for Titus to find qualified elders.
One of the requirements was for elders to be capable of teaching true doctrine and refuting false doctrine. This requirement ties to Paul’s insistence that Titus also refute the false teachers. Paul writes about the correlation between bad doctrine and bad behavior; he does not specify the false teaching, but it appears to have elements of myths about angels and philosophical teachings about the inherent evils of physical things.
Paul spends much of this letter writing about ways Christians are to behave. Rather than providing long lists of things to do and not to do, Paul instead gives them guidelines about doing good. He summarizes his desires in Titus 3:14, where he says Christians should concentrate on doing good so they can meet important needs and live productive lives.