Thinking of taking a PhD Course in that involves Materials Engineering

If this a UK university I'd suggest you start by approaching, -ideally by chatting in person if at all possible- to the person who would be the PhD supervisor or lead supervisor it it is a departmental team, failing that to whoever looks at applications.. They will not want folk starting who cannot complete, nor will they want to miss out on potentially a very good candidate due to misunderstanding about requirements. Only they know what they are really expecting from a successful candidate and how much needs to be prior knowledge.

A taught PhD is a relatively new thing - back in the last century when I did mine (*) the only recognized method for an engineering PhD was to perform original research under supervision - and that requires a person who is a strongly self starting and very confident to get stuck into topics unknown (by anyone on the planet). As such a taught PhD must still have a substantial original research aspect, so that self motivating, maybe borderline obsessive character trait is still required. Are you happy to be immersed in something for a no of years, and to live and breath that subject  to the exclusion of almost everything else? if not university research may not he your thing, and the answer may be already  known ...
It is the taught aspects that will require prior knowledge, and that will depend on where the course material starts - with advance information about that you may well be able to read yourself in to fill any holes in your knowledge.
This advice is necessarily general -  I don't know your history or character, or the detail of the PhD positions, and you may have already done this and if so I apologise.

Mike.
(*) OK now I feel old....

If this a UK university I'd suggest you start by approaching, -ideally by chatting in person if at all possible- to the person who would be the PhD supervisor or lead supervisor it it is a departmental team, failing that to whoever looks at applications.. They will not want folk starting who cannot complete, nor will they want to miss out on potentially a very good candidate due to misunderstanding about requirements. Only they know what they are really expecting from a successful candidate and how much needs to be prior knowledge.

A taught PhD is a relatively new thing - back in the last century when I did mine (*) the only recognized method for an engineering PhD was to perform original research under supervision - and that requires a person who is a strongly self starting and very confident to get stuck into topics unknown (by anyone on the planet). As such a taught PhD must still have a substantial original research aspect, so that self motivating, maybe borderline obsessive character trait is still required. Are you happy to be immersed in something for a no of years, and to live and breath that subject  to the exclusion of almost everything else? if not university research may not he your thing, and the answer may be already  known ...
It is the taught aspects that will require prior knowledge, and that will depend on where the course material starts - with advance information about that you may well be able to read yourself in to fill any holes in your knowledge.
This advice is necessarily general -  I don't know your history or character, or the detail of the PhD positions, and you may have already done this and if so I apologise.

Mike.
(*) OK now I feel old....

Hello Mr. Mike,

Thank you for your kind response. I am a finisher. The positions are still open. My background was in Telecommunications and then worked mainly as a Manufacturing Instrumentation Sales Engineer. I worked mainly using instruments for process improvement in the manufacturing sector. I have PM experience as well and did an MSc course in Smart Factory design using Digital Twin Technology. Energy monitoring solutions to mention a few.

Thank you Sir and you are not too old, you lot have wisdom to dispense. Kindly do so we ride on your experiences to achieve great things.

Theophilus.