## Though a door was opened to me ##

Just like an open door allows one to walk through, so Paul was given an opportunity to share the gospel message at Troas. AT: "I was given an opportunity" - (See: [[rc://en/ta/man/translate/figs-metaphor]])

## my brother Titus ##

Paul often refers to other people who share in his ministry his brother in Christ.

## So I left them ##

"So I left the people of Troas"