I intend to go to Tianjin by train from Beijing this December. How to travel between attractions.

Do you mean that you want to know the transportation between scenic spots in TJ?
If yes, subway and taxi are good choices for you. The subway route and stations have English version. And it's also easy for you to get a taxi. Don't worry about this. :-)

If you want to know the detail transportation routes, you can tell me a general plan of your traveling including the places you want to go, I may help you to arrange detail routes.