“To Titus, mine own son after the common faith: Grace, mercy, and peace, from God the Father and the Lord Jesus Christ our Saviour.”
King James Version (KJV)
1:4 My own son - Begot in the same image of God, and repaying a paternal with a filial affection. The common faith - Common to me and all my spiritual children.
Tit 1:4 To Titus, [my] own son. Concerning Titus, see topic 9253. The language here shows that he was one of Paul's converts.