Titus 2 is all about discipleship - learning to live the way God wants us to live. Men and women should seek out being mentored by godly examples within the church.
Discipleship is all about following our Master Jesus Christ and learning to live by the wisdom of His Word. When Jesus called His first disciples, the plan was to spend time together with Him (Mark 3:14) and learn from Him. Christ called those men to obey, follow, and learn from Him. At the end of His earthly ministry Jesus met with those disciples and told them to spend the rest of their days going into all the world and teaching those who want to follow and obey Christ, how to be learners or disciples all their days (Matthew 28:19-20). We call that the Great Commission.
Paul identified behavior that follows a proper understanding of God (or "sound doctrine"). When Paul gave these clear objectives for Titus as he taught the older men, it was to show them how to "adorn the doctrine of God". Their lives, if reflecting these qualities, would become a strong advertisement for God in a "crooked and perverse" world.
Taken from "Living Wisely in a Foolish World" by Discover the Book Ministries (used by permission).