RobH_en_tn/tit/01/04.md

a true son

Though Titus was not Paul's biological son, they share a common faith in Christ. Thus, in Christ, Paul considers Titus as his own son. Alternate translation: "you are like a son to me" (See: rc://en/ta/man/translate/figs-metaphor)

our common faith

Paul expresses the same faith in Christ that they both share. Alternate translation: "the teachings that we both believe"

Grace and peace

This was a common greeting Paul used. You can state clearly the understood information. Alternate translation: "May you experience kindness and peace within" (See: rc://en/ta/man/translate/figs-ellipsis)

Christ Jesus our Savior

"Christ Jesus who is our Savior"