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In the recent time friction stir welding ( FSW ) , a solid state welding process has rapidly gained attention for joining high melting point materials like Cu , Fe , Ti and their alloys apart from Al alloys due to its several advantages over fusion welding techniques .
 manufacturing process: friction stir welding; manufacturing process: FSW; manufacturing process: solid state welding; concept or principle: process; manufacturing process: joining; machanical property: melting point; concept or principle: materials; material: Cu; material: Fe; material: Ti; material: alloys; material: Al alloys; manufacturing process: fusion welding
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: manufacturing standard, machanical property, manufacturing process, material, engineering feature, process parameter, machine or equipment, application, process characterization, enabling technology, biomedical, concept or principle 
Text: {0} 
Answer:
 manufacturing process: friction stir welding; manufacturing process: FSW; manufacturing process: solid state welding; concept or principle: process; manufacturing process: joining; machanical property: melting point; concept or principle: materials; material: Cu; material: Fe; material: Ti; material: alloys; material: Al alloys; manufacturing process: fusion welding