Chris, that wire won't work, and I don't think you should try to make stakes like the ones in that teenager's ebay auction. They have badly designed heads that might lead to the shelter guylines slipping off, in my opinion.
Grade 1 ("Commercially Pure") titanium is very soft. You don't get any of the mechanical benefits of using titanium if you use Grade 1. Alloys like 6Al4V (grade 5) are just as light but much stronger and stiffer. I would recommend 1/8" or 3/32" 6Al4V wire. You can get this on ebay or from TitaniumJoe.com. I've used this for making lots of skewer stakes and stove parts. 1/16" wire is too thin for tent stakes.
The wire can be bent into the desired shape with pliers and a propane torch.