Your David E could be my great great grandfather. He married Emily Griffen and his second marriage was to Elizabeth Emma Munn, he had about 7 more children with her. David is the father of James S Titus and grandfather of William Haizlet Titus. My grandfather William married Etta May Wescott. James S Titus married Clara B Mott.
David G Ball has a web sight called "The New England Ball Project.com" that lists Titus people back to 1740. That may give you part of your missing pieces.
My sight is Titus,Jameson,Fischer,Estrada,Wotring,Krause. There is also one called Morris,Titus,Makinson,Wescott who is a cousin. These 3 sights should give you what you need to take you farther back. Mines a work in progress as I keep finding missing pieces all over the place but don't add until I have exhausted all the sources and records I can find.