Variable Load,
Sorry for the tardy reply. Silver against Ti is usually prohibited due to galvanic corrosion issues. This situation would likely be exacerbated by a marine atmosphere.
Here's NASA's position on the issue (page 3, last sentence):
"Due to corrosion potential, silver plated parts must not contact titanium."
http://engineer.jpl.nasa.gov/practices/2201.pdf
The galvanic potential between silver and titanium is normally less than 0.20V, which would be considered borderline acceptable for other metal combinations. But apparently Ag on Ti is a problem, and I can't give you a technical explanation why.
Hope that satisfies your need for a "scientific" validation of my comments.
Regards,
riff_raff