This may be helpful although it may generate some HF in situ Phosphoric acid and sodium fluoride: a novel etching combination on titanium https://pubmed.ncbi.nl

This may be helpful although it may generate some HF in situ Phosphoric acid and sodium fluoride: a novel etching combination on titanium https://pubmed.ncbi.nlm.nih.gov/24704898/ https://pubmed.ncbi.nlm.nih.gov/24704898/