If memory serves me correctly, a priest cannot get married. If a person wishes to enter the priesthood and is already married, I believe the Catholic Church, in some cases, will allow that.
If one is going to interpret this to be directed at the responsibilities of priests, what I pointed out in Titus 1:5-6 would suggest that all priest may marry and have children. Saying that it is a matter of Church discipline that priests shouldn't marry is effectively saying that Paul, while writing this under the influence of the Holy Spirit, didn't know what was best for the Church. That, to me, is like saying God doesn't know what's best.
I would disagree twice.
But first, yeah generally not only priests but deacons can't marry once they're ordained.
I don't think the Titus passege works either to permit or to forbid priests marrying after ordination. Clearly they may BE married, no question there. But I don't think it goes either pro or con on marriage after being ordained.
As I read it Paul is telling Titus about what to do in a particular place at a particular time. I would need the text to say it should always and everywhere be like this before I would think such a piece of advice to be meant for the church to follow at all time. So I don't think we know better than God.