While personal experience is valuable the particular circumstances vary widely, most significantly moisture. After 40 years in metallurgical plants, in similar circumstances I can tell you the galvanic corrosion potential, which is what causes these issues, is much higher with Ti and Al than carbon steels and Al. A higher amount of electrolytes (salt) in the moisture in a sea breeze will accelerate the corrosion. As you all know from experience keeping the dissimilar metals apart with a coating is the key.