The commercially pure titanium (unalloyed titanium) ASTM grades 1 to 4 can be used for applications involving acetic acid, or acetic acid combined with acetic anhydride, chlorine ion, or formic acid. The corrosion data for grade 1, grade 2, grade 3 and grade 4 titanium in various acetic acid solutions are presented in below table.

Medium	Concentration, %	Temperature, °C	Corrosion Rate, mm/yr
Acetic Acid	5~99.7	124	nil
Acetic Acid	33~vapor	boiling	nil
Acetic Acid	99	boiling	0.003
Acetic Acid	65	121	0.003
Acetic Acid	58	130	0.381
Acetic Acid	99.7	124	0.003
Acetic Acid + 3% acetic anhydride	Glacial	204	1.02
Acetic Acid + 1.5% acetic anhydride	Glacial	204	0.005
Acetic Acid + 109 ppm Cl-	31.2	boiling	0.259
Acetic Acid + 106 ppm Cl-	62.0	boiling	0.272
Acetic Acid + 5% formic acid	58	boiling	0.457
Acetic Anhydrite	100	21	0.025
Acetic Anhydrite	100	150	0.005
Acetic Anhydrite	99.5	boiling	0.013

*All values are based on engineering practices and lab tests and shall be used only as a guideline for titanium performance.
*The corrosion rate may vary depending on changes in medium chemistry, temperature, length of exposure, and other factors.