dissolve Ti but not tool steel

This newsgroup is my last hope.
What can I use to dissolve/etch away Ti (commercial purity) that is
stuck to the inside of a tool steel nozzle but not attack the tool steel
Thanks for any help you can give me
Reply to
Steven Celotto
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I have an idea but wonder if it is practical. Is this a problem that needs a one time fix or are you looking for a way to clean out this nozzle on a regular basis?
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