Tig'ing Titanium

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Anyone have any tips for tig welding titanium.  A tee with .05 thick cap and .03 web.  B21S material.  Skip weld?, settings, shelding, ect.
Reply:http://www.millerwelds.com/resources...rticle120.html
Reply:I have never done it, but i have herd your gas coverage has to be spot on. I was told that the weld should not change colors at all when you have correct gas coverage.Ya gotta spend money to make money!
Reply:Ti is extremely sensitive to oxygen contamination so your gas coverage does need to be plentiful. It also loves to distort so using a pulser is a great idea as is skipping around. Ti-Met has a great resources for working with Ti in general called 'Ti-handbook' or at least that is what the pdf I down loaded is called. Read through the sections that are applicable to your task and go for it. The one thing that you can not do enough of with Ti is clean it. scotch bright your parts, clean with acetone, fit, acetone again, lots of argon and then you can weld. The welding itself is the easy part.
Reply:Echoing what everyone else has said about gas coverage, this means the back side, too.  I like to have my guys run a purge box made from 24 gauge galvanized to make sure that they don't have gaps in the gas coverage.  Bear in mind that mine is mostly plate joints, but you get the idea.  Also, post flow is your friend.
Reply:we also recommend a gas lens...  less turbulence (which can pull oxygen into the weld zone)Check out the Weld Titanium Like a PRO paper in our Welding Libraryhttp://www.arc-zone.com/index.php?ma...id=8&chapter=0-----------------------Carmen Electrodewww.CarmenElectrode.comand the boss blogs at  www.JoeWelder.comall powered by  www.Arc-Zone.com
Reply:I always used a trailer on my tig torch when welding ti,  that way the gas remained over the weld while cooling.  Some times I would tape a plastic bag over the weld area  and fill with argon  like a tent , then I would poke  a hole for my torch and filler wire and weld looking through the bag.