钛合金是一种轻质、比强度高、耐腐蚀、耐热、无磁、中温和焊接性能及韧性好的结构材料，由于其良好的综合性能而被广泛应用于航空领域，多用于制造航空发动机中的重要零部件和飞机结构件。
  钛合金零件在成形后需要经过切边工序。随着飞机性能要求的提高，对钛合金蒙皮件的轮廓精度要求更高，激光切边和数控铣方法切边在精度上均能满足要求。但切割方法是否对材料的使用性能产生不利的影响需要进一步研究，虽然在激光切割热影响方面有些研究，但激光切割试件单拉试验未见报道。本文通过单向拉伸试验研究激光切割和数控加工方法对钛合金蒙皮零件的影响。  
  为了研究激光切割和机械加工两种方法在钣金件切边中对工件的影响，采用激光切割和机械加工两种方法制作拉伸试件．并利用CMT6000微机控制电子万能试验机在常温条件下完成了拉伸试验。通过对试验结果的分析整理完成了两种方法的对比，结果表明：激光切割试件和机械加工试件得到的两组拉伸曲线在颈缩后有明显区别，激光切割的试件在拉伸过程中没有明显颈缩，且延伸率明显小于机械加工试件的延伸率。    
   
通过对激光切割得到的试件和机械加工得到的试件进行单拉对比试验，对试验结果进行分析总结得到以下结论：

(1) 激光切割试件和机械加工试件得到的拉伸曲线在颈缩后两组曲线有明显区别，激光切割的试件在拉伸过程中没有明显颈缩，是由于在出现颈缩后马上断裂的缘故。

(2)在拉伸试验中机械加工试件对应的最大载荷、屈服强度、拉伸强度均高于激光切割的试件对应的最大载荷、屈服强度、拉伸强度，但差别较小，而延伸率差别较大。

(3)在将激光切割方法应用于实际生产时，有必要进一步进行疲劳试验，以确定该方法是否满足要求。文章来源：（http://www.akstzs.cn ）
Titanium alloy is a lightweight, high specific strength, corrosion resistance, heat resistance, no magnetism, welding mild performance and good toughness of structural materials, due to its good comprehensive properties and is widely used in the field of aviation, used for aviation engine important parts of the aircraft structure parts manufacturing.
Titanium alloy parts need to go through the trimming process after forming. With the improvement of aircraft performance requirements, the contour accuracy of the titanium alloy skin parts is higher, and the laser trimming and numerical control milling method can meet the requirements of the cutting edge. However, whether the cutting method has a negative effect on the performance of the material needs further research, although there are some research in laser cutting thermal effect, but the laser cutting test piece single pull test has not been reported. In this paper, the influence of laser cutting and numerical control machining on titanium alloy skin parts is studied by means of uniaxial tension test.
In order to study of laser cutting and mechanical processing method in sheet metal cutting edge of workpiece effects by laser cutting and machining two methods produced tensile specimen. And the use of microcomputer CMT6000 control electronic universal testing machine under the condition of normal temperature the tensile test. Through the analysis of the test results finishes the comparison of two methods, results show that laser cutting test and the mechanical processing to obtain two groups of tensile curve in the post necking has the obvious difference, the laser cutting of the test pieces in the tensile process of no apparent necking, and elongation is obviously smaller than that of the mechanical processing extension rate.
Through the test of the laser cutting and mechanical processing of the test specimens to carry out a single pull contrast test, the results of the analysis of the test results are summarized as follows:
(1) laser cutting and machining test specimens obtained from tensile stress strain curves of the necking after two groups of curves have obvious difference, laser cutting of specimens in the tensile process of no apparent necking is due to the necking immediately after the fault reason.
(2) in the tensile test of mechanical processing specimens corresponding to maximum load, yield strength and tensile strength are higher than that of laser cut test parts corresponding to the maximum load, yield strength, tensile strength, but little difference, and extends the rate difference is larger.
(3) it is necessary to carry out the fatigue test in order to determine whether the method can meet the requirements when the laser cutting method is applied to the production.