You could try contacting the Titanium Information Group. Their contact details are at http://www.azom.com/KeyServices.asp?SupplierID=478
I imagine they would be able to put you in contact with someone helpful.
you may find this article of interest http://www.azom.com/details.asp?ArticleID=1548
There is also a link to the Ti Information Group on the right hand side. They may be able to provide you with some more information.
If you are interested in more details, it is a process offered by Bodycote Heat Treatment, see http://www.azom.com/news.asp?newsID=660. There is also more information on their site about the process.
I suggest you contact these guys who are specialists in the testing of ceramic materials.
http://www.azom.com/KeyServices.asp?SupplierID=188
in particular this gentleman
http://www.azom.com/experts.asp?iExpertID=63
You may find some intersting information at http://www.azom.com/details.asp?ArticleID=52, there is a link to a property table in the top right which may help you out.