Hi Jennifer,
Your itinerary looks great so far! :)
When you're in Cork, take a trip out to nearby Cobh if you have the time. You'll find a lot more Titanic history there since it was the ship's last port of call, and it will be a nice connection to your visit to the Titanic Experience in Belfast. I also recommend the
Titanic Trail, since the tour is filled with history and lovely sights around the harbour. Cork itself is a great city for wandering through, and the English Market is a lovely stop to grab a bite to eat. You'll find stalls with all sorts of locally produced food and dishes there, and there is something for everyone.
In
Galway, make sure to explore the city and soak up the atmosphere. You'll find pubs with great trad music sessions, and restaurants with amazing seafood. Are you planning on venturing outside of the city as well? You could go on a trip to
Connemara National Park and make a stop at the harbour town of Clifden for a hot drink or dinner on the way back. It's an absolutely stunning area, you won't know where to look. :)
Let me know if there's anything else you need!