I don't know if this helps since you're looking at Sussex County, but I have Titus ancestors who lived in Passaic County. Tunis Titus was born in 1787 and died in New Foundland, Passaic County NJ in 1849 of Cholera. His wife Mary ??? of Pennsylvania pre-deceased him. His info is from the mortality schedule of 1850 and I also have a copy of his will.
He had a son, John Titus, born 1810/11 in Pompton, Passaic County, New Jersey, who married "Julia" and had a brother Peter. Sometimes their farm is listed as being in Morris County. The cemetery they're in is extremely small and if I remember correctly, is located in Haskell, off Wanaque Ave.
From there the line continues with Martin, Martin Jr.,Jennie and me, Gillian.
My tree is under the Romain name, since it's now mostly for the children and grandchildren.
Good luck. If you're related to Tunis and ever hear anymore about him, I'd love to know some more details.