There is a spoiler for one plot point in the Typhon Pact novels in the newest Voyager book, The Eternal Tide.
So you might want to save that one for later.
Are you only wanting to read the Titan novels or do you want to continue the stories of TNG, DS9, and the Aventine after Destiny
as well? The Titan is only in the one Typhon Pact novel.
You might also be interested in looking at my website, which is linked in my signature.