Not sure which Ti leader you are using (I use Terminator brand) but a three wrap clinch is what you use to tie the fly to the wire. DO NOT over tighten the knot. IF you pull too hard on the tag end trying to cinch the knot the wire will snap. A loose three wrap clinch with a 1/8" tag looks nasty as far as knots go but I have never had one fail in 10+ years of extensive use. As far as attaching the wire to the leader, use an Albright. A well tied albright will cinch down well and is bombproof.

Jeff - AKA Dr. Fish
If it has fins and swims than I must chase it!