Engineering Design Material Selection

I need assistance with a mechanical engineering assignment focused on material selection for an engineering design project.

Requirements:
- Expertise in engineering design principles
- In-depth knowledge of materials and their properties
- Ability to recommend suitable materials based on project requirements

Ideal Skills:
- Mechanical engineering background
- Experience with material selection in design projects
- Strong analytical and problem-solving skills

Please provide a detailed approach and rationale for material choices.