Titanium connecting rods for sbm 416

2 questions:

1. What makes you think titanium rods will give you better longevity?
2. Why do you think you would have to tear the engine down every year; particularly if you only drive 5000 miles a year?
(1). Lighter reciprocating weight. From some of the ready I've done on the 416's is that the pistons wear out quicker from the heavier connecting rods. The pistons are short so it is harder on them.
(2). Just a figure of speech. I only want to build the engine once and not have to rebuild it after a couple years. I would like it to last 10-15 yrs.