Forum Moderators: Robert Charlton & goodroi
If two of your pages have the exact same title, are the exactly the same then, in content? You may want to point out the difference with a word in the title and the description.
To make your site better for your readers, it should accuratly reflect what the user will see when they click you from an SE.
If you write title's and descriptions for the sole purpose of SE placement you will not do as well as if you wrote them for the public. You should consider both in your strategy, giving the reader priority.
Duplicate titles and descriptions ALONE will not cause you a filter IMO, BUT it is likely part of the overall picture G looks at, so if the T & D are the same, AND a good percentage of the content is too, expect a filter.
Is it something like "Fishing in Alaska" and "Fishing in Texas", where you can't avoid certain repetitions?
I think you'll get by with 2 out of 5 word duplications, but its just my opinion. I've had the same issue, and I have gone with a ratio similiar to what you propose.