[1] [1] Liu Qixian, Liu Yang, Gao Kai. Research process and application of titanium alloys[J]. Aeronautical Manufacturing Technology, 2011. 45-48.

[2] [2] Akman E, Demir A, Canel T, et al.. Laser welding of Ti6AL4V titanium alloys[J]. Journal of Materials Processing Technology, 2009, 209(8): 3705-3713.

[3] [3] Zhang Y, Sato Y S, Kokawa H, et al.. Microstructural characteristics and mechanical properties of Ti-6AL-4V friction stir welds[J]. Materials Science and Engineering A, 2008, 485(1-2): 448-455.

[4] [4] Mesharam S D, Mohandas T A. Comparative evaluation of friction and electron beam welds of near-α titanium alloy[J]. Materials and Design, 2010, 31(4): 2245-2252.

[5] [5] Fellman A, Salminen A. Study of the phenomena of fiber laser-MAG hybrid welding[C]. In Proceedings of 26th international congress on applications of lasers and electro-optics (ICALEO), 2007. 871-880.

[6] [6] Steen W M. Arc auegmented laser processing of materials[J]. Journal of Applied Physics, 1980, 51(11): 5636-5641.

[7] [7] Cui Li, He Dingyong, Li Xiaoyan, et al.. Effect of welding parameter on weld shape in fiber laser-MIG hybrid welding of titanium alloy[J]. Aeronautical Manufacturing Technology, 2009, (10): 120-125.

[8] [8] Murakami T, Nakata K, Yamamoto N, et al.. Formation of one pass fully-penetrated weld bead of titanium plate by fiber laser and MIG arc hybrid welding[J]. Materials Transactions, 2012, 53(5): 1017-1021.

[9] [9] Boyer R, Welsch G, Collings E W. Materials Properties Handbook: Titanium Alloys[M]. USA: Materials Park, 1994. 159.

[10] [10] Zhao Yaobang, Lei Zhenglong, Chen Yanbin. Analysis of melting characteristics of laser-arc double-sided welding for stainless steel[J]. Chinese J Lasers, 2011, 38(2): 0203001.

[11] [11] Zhao Ziqiang. Study on Plasma Shape and Weld Characteristic During Laser-TIG Hybrid Welding[D]. Beijing: Beijing University of Technology, 2011. 38.

[12] [12] Cui Li, He Dingyong, Li Xiaoyan, et al.. Effects of welding direction on weld shape of fiber laser-MIG hybrid welded titanium alloys[J]. Chinese J Lasers, 2011, 38(1): 0103002.

[13] [13] H Hitoshi, I Takashi, K Shigeharu, et al.. Effect of shielding gas and laser wavelength in laser welding of magnesium alloy sheet[J]. Quarterly J Japan Welding Society, 2001, 19(4): 591-599.

[14] [14] Cao Na. The Study on Working Head for Titanium Laser Welding[D]. Beijing: Beijing University of Technology, 2006. 3.

[15] [15] Xu Jiejie. Research on Microstructures and Properties of Laser Welding Joints of TC4 Titanium Alloy[D]. Beijing: Beijing University of Technology, 2009. 15.

[16] [16] Fang Junfei. Study on the Mechanism of Penetration Mode for Thin Sheet Laser Deep Penetration Welding[D]. Harbin: Harbin Institute of Technology, 2007. 62.

[17] [17] Zhang Shenghai, Shen Yifu, Zhu Zuojun. Thermodynamic study on laser-induced plasma in CO2 laser welding of aluminum alloy[J]. Chinese J Lasers, 2012, 39(s1): s103008.

[18] [18] Yin Shuyan. The Base Theory and Application of Gas Shielded Welding[M]. Beijing: China Machine Press, 2012. 9.

[19] [19] Shen Yifu, Zhang Shenghai. Current research status and development trends of laser welding[J]. Chinese J Lasers, 2012, 39(s1): s103002.

[20] [20] Feng Lei, Chen Shujun, Yin Shuyan. Mechanism of undercut phenomenon in high speed welding[J]. Transactions of the China Welding Institution, 1999, 20(1): 16-21.

[21] [21] Lu Zhenyang. Research on the Mechanism of Undercut Formation and High Speed Welding Technology[D]. Beijing: Beijing University of Technology, 2006. 69.

[22] [22] C Leyens, M Peters. Titanium and Titanium Alloys[M]. Beijing: Chemical Industry Press, 2006. 13.