In absence of CO₂ Ti grades 2 and 5 suffer crevice corrosion at temperatures 80 °C and 200 °C.

For Ti grade 5 crevice corrosion can occur as low as 80 °C in the presence of CO₂.

Ti grade 7 is immune to crevice corrosion in test conditions.

All grades resistant to SCC and pitting in presence of CO₂.

Rare earth yttrium additions below 0.2 wt%. for improved mechanical properties are detrimental to corrosions performance.

Analysis of threat of hydrogen induced cracking suggest this is not a threat at a deepsea well head.