It looks like you're already using a custom STYLE template for your output. The easiest thing to do to alter the title would be to look at changing the SystemTitle style element. Depending on the version of SAS that you're using, you may need/want to change the TitleandNoteContainer style element, too.
To put a box around the title, you would use the FRAME style attribute and you would also probably change the BorderColor, BorderWidth and Background style attributes as well.
I believe that if you use 2 Title statements, you will get 2 boxes, one around each title statement text string. If this is not what you want to see, then, your choice is to put a "line feed" or "carriage return" into your title string using ODS ESCAPECHAR techniques.
Depending on your version of SAS (9.1.3 vs 9.2), you may have to use slightly different syntax, but the essential technique is to
1) define an escape character with the ODS ESCAPECHAR statement and then
2) use the escape character appropriately in your code to accomplish the change or effect you want.
Not sure that you can do this without using a template for tabular output -- there are some new bordertopstyle, borderbottomstyle attributes in SAS 9.2 -- but you'd have to use them with ODS ESCAPECHAR methods and I'm not sure they'd work in all destinations. It's possible that you might do it with CSS -- but if you were going to use CSS, you might as well use a template (and you'd need 9.2 to use the new CSSSTYLE for ODS RTF or ODS PDF).
In SAS/GRAPH programs, the BOX option works on the TITLE statement. But for tabular output, that option isn't used by ODS.