FAA issued proposed rule on this engine series last year.
https:// www.federalregister.gov/documents/2017/08/25/2017-17828/airworthiness-directives-cfm-international-sa-turbofan-engines
What's weird is the fan looks intact. But I'm repeating myself.
Titanium. Typically double or triple melt to get rid of impurities and occlusions.
Or composite. Not familiar with that particular rotor.