ISB ~ Titus 1 v5

I left you in Crete:Implies that Paul and Titus evangelized the island together before the apostle’s departure. Nothing more is known of this missionary effort.

appoint elders:An essential step in organizing and stabilizing young Christian communities (Acts 14:23). That Titus is charged with this duty indicates that he is already a bishop and thus qualified to ordain others to priestly ministry by the sacramental imposition of hands (1 Tim 5:22) (CCC 1573, 1576). Notice that in this letter, as in the earliest days of the Church, the titles “elder” (Tit 1:5) and “bishop” (1:7) seem to be used interchangeably (Acts 20:17, 28). See notes on 1 Tim 3:1 and 1 Tim 4:14.